kth.sePublications
Change search
Refine search result
12 1 - 50 of 62
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Benedek, Peter
    et al.
    Swiss Fed Inst Technol, Dept Informat Technol & Elect Engn, CH-8092 Zurich, Switzerland..
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Yazdani, Nuri
    Swiss Fed Inst Technol, Dept Informat Technol & Elect Engn, CH-8092 Zurich, Switzerland..
    Matsubara, Nami
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Sassa, Yasmine
    Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden..
    Juranyi, Fanni
    Paul Scherrer Inst, Lab Neutron Scattering & Imaging, CH-5232 Villigen, Switzerland..
    Medarde, Marisa
    Paul Scherrer Inst, Lab Multiscale Mat Experiments, CH-5232 Villigen, Switzerland..
    Telling, Mark
    Rutherford Appleton Lab, ISIS Neutron & Muon Facil, Didcot OX11 0QX, Oxon, England..
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Wood, Vanessa
    Swiss Fed Inst Technol, Dept Informat Technol & Elect Engn, CH-8092 Zurich, Switzerland..
    Quantifying Diffusion through Interfaces of Lithium-Ion Battery Active Materials2020In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 12, no 14, p. 16243-16249Article in journal (Refereed)
    Abstract [en]

    Detailed understanding of charge diffusion processes in a lithium-ion battery is crucial to enable its systematic improvement. Experimental investigation of diffusion at the interface between active particles and the electrolyte is challenging but warrants investigation as it can introduce resistances that, for example, limit the charge and discharge rates. Here, we show an approach to study diffusion at interfaces using muon spin spectroscopy. By performing measurements on LiFePO4 platelets with different sizes, we determine how diffusion through the LiFePO4 (010) interface differs from that in the center of the particle (i.e., bulk diffusion). We perform ab initio calculations to aid the understanding of the results and show the relevance of our interfacial diffusion measurement to electrochemical performance through cyclic voltammetry measurements. These results indicate that surface engineering can be used to improve the performance of lithium-ion batteries.

  • 2.
    Brett, Calvin
    et al.
    KTH, School of Engineering Sciences (SCI), Engineering Mechanics. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center. Deutsches Elektronen Synchrotron, Notkestraße 85, Hamburg, Germany.
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Kreuzer, L.P
    TU München, Germany.
    Widmann, T.
    TU München, Germany.
    Porcar, L.
    Institut Laue-Langevin, 71 Avenue des Martyrs, Grenoble, France.
    Yamada, N. L.
    High Energy Accelerator Research Organization (KEK), 203-1 Shirakata, Tokai, Naka 319-1106, Japan.
    Matsubara, Nami
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Müller-Buschbaum, P.
    TU München, Germany.
    Söderberg, Daniel
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center. KTH, School of Engineering Sciences (SCI), Engineering Mechanics.
    Roth, Stephan V.
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology. Deutsches Elektronen Synchrotron, Notkestraße 85, Hamburg, Germany.
    Humidity-Induced Nanoscale Restructuring in PEDOT:PSS and Cellulose Nanofibrils Reinforced Biobased Organic Electronics2021In: Advanced Electronic Materials, E-ISSN 2199-160X, Vol. 7, no 6, p. 2100137-, article id 2100137Article in journal (Refereed)
    Abstract [en]

    In times where research focuses on the use of organic polymers as a base for complex organic electronic applications and improving device efficiencies, degradation is still less intensively addressed in fundamental studies. Hence, advanced neutron scattering methods are applied to investigate a model system for organic electronics composed of the widely used conductive polymer blend poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) together with nanocellulose as flexible reinforcing template material. In particular, the impact of relative humidity (RH) on the nanostructure evolution is studied in detail. The implications are discussed from a device performance point of view and the changing nanostructure is correlated with macroscale physical properties such as conductivity. The first humidification (95% RH) leads to an irreversible decrease of conductivity. After the first humidification cycle, however, the conductivity can be reversibly regained when returning to low humidity values (5% RH), which is important for device manufacturing. This finding can directly contribute to an improved usability of emerging organic electronics in daily live.

  • 3.
    Brett, Calvin
    et al.
    KTH, School of Engineering Sciences (SCI), Engineering Mechanics. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center.
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Kreuzer, Lucas
    Wiedmann, Tobias
    Porcar, Lionel
    Yamada, Norifumi
    Matsubara, Nami
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Müller-Buschbaum, Peter
    Söderberg, Daniel
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fiberprocesser.
    Roth, Stephan V.
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Biocomposites.
    Humidity-induced Nanoscale Restructuring in PEDOT:PSS and Cellulose reinforced Bio-based Organic ElectronicsManuscript (preprint) (Other academic)
  • 4.
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics.
    1D to 3D Magnetism in Quantum Materials: A study by Muons, Neutrons & X-rays2021Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    A collection of works stretching from low- to three-dimensional magnetism are presented, studied mostly through muon spin rotation, relaxation and resonance (µ +SR). The theoretical background of this technique is outlined in Chapter 2, which introduces the subject from the muon particle as an astro[1]nomical particle to how they are produced here on Earth. Given the specific properties of weak particle interactions, previous generations of scientists developed the technique of µ +SR. Special care is taken to explain how the anti-muon interacts with magnetic fields and the resulting behaviour of the anti-muon in a given magnetic field configuration. The fundamental principle of µ +SR is to interpret the resulting muon behaviour in order to unveil microscopic details of the compounds of interest. Other experimental techniques were utilised to confirm the assessment made by µ +SR and to probe different aspects of the compounds being studied. Specifically, neutron and X-ray scattering were performed; the corresponding theoretical background is presented in Chapter 4. Interpretations, conclusions and discussions regarding the studied compounds are presented in Chapter 5. This chapter is divided into four parts depending on the study: one-dimensional (1D), two-dimensional (2D) and three-dimensional (3D) magnets and studies related to µ +SR in general. The 1D compounds comprise mostly samples within the Hollandite family, which exhibit quasi-1D chains of transition metal ions. These chains may in certain cases facilitate interactions in a 1D fashion, which is a very interesting feature. In particular, a quantum spin liquid phase is found in one of the compounds, stabilised by a peculiar form of charge ordering occurring at high temperature. Microscopic evidence for the absence of a Peierls transition in a ferromagnetic metal-insulator transition compound is presented as well. The 2D compounds include layer-structured samples in which intralayer interactions are assumed to be dominant. Interestingly, the ground state was found to not be governed only by the intralayer interactions, at least in one of the compounds. Instead, the charge distribution in between the layers seems to have a role to play, as the specific cation ordering determined the ground state. A study in which this distribution is changed to study its effect on the ground state is presented. The 3D magnets considered here exhibit unique interactions available in these compounds. Complicated phases emerge above the transition temperature due to modulation of interactions in space. Finally, a collection of interesting studies related to general µ +SR are included in Chapter 5. These include a study of lithium ion diffusion anisotropy detected for the first time by µ +SR and a semantical discussion related to the term muonium. Other studies not related to this thesis are listed in Articles not included in this thesis. This thesis concludes with Chapter 6, which briefly summarises the work and the resulting outcomes. Most importantly, a smaller discussion on the future of physics is presented, considering its implications for society and science as a whole.

    Download full text (pdf)
    fulltext
  • 5.
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Your Muonium is μ-drogen2018In: Journal of the Physical Society of Japan, ISSN 0031-9015, E-ISSN 1347-4073Article in journal (Refereed)
    Download full text (pdf)
    fulltext
  • 6.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Andreica, D.
    Sassa, Y.
    Nozaki, H.
    Umegaki, I.
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Jonsson, Viktor
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Tjernberg, Oscar
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Guguchia, Z.
    Shermadini, Z.
    Khasanov, R.
    Isobe, M.
    Takagi, H.
    Ueda, Y.
    Sugiyama, J.
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Magnetic phase diagram of K 2 Cr 8 O 16 clarified by high-pressure muon spin spectroscopy2019In: Scientific Reports, E-ISSN 2045-2322, Vol. 9, no 1, article id 1141Article in journal (Refereed)
    Abstract [en]

    The K 2 Cr 8 O 16 compound belongs to a series of quasi-1D compounds with intriguing magnetic properties that are stabilized through a high-pressure synthesis technique. In this study, a muon spin rotation, relaxation and resonance (μ + SR) technique is used to investigate the pressure dependent magnetic properties up to 25 kbar. μ + SR allows for measurements in true zero applied field and hereby access the true intrinsic material properties. As a result, a refined temperature/pressure phase diagram is presented revealing a novel low temperature/high pressure (p C1 = 21 kbar) transition from a ferromagnetic insulating to a high-pressure antiferromagnetic insulator. Finally, the current study also indicates the possible presence of a quantum critical point at p C2 ~ 33 kbar where the magnetic order in K 2 Cr 8 O 16 is expected to be fully suppressed even at T = 0 K.

  • 7.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Andreica, Daniel
    Ioan Ursu Institute, Faculty of Physics, Babes-Bolyai University, 400084 Cluj-Napoca, Romania .
    Ohta, Hiroto
    Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan .
    Imai, Masaki
    Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502 Japan .
    Michioka, Chishiro
    Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502 Japan .
    Yoshimura, Kazuyoshi
    Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502 Japan .
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Sugiyama, Jun
    Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), Tokai, Ibaraki 319-1106, Japan 6 Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan .
    Co-existence of short- and long-range magnetic order in LaCo2P22021In: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. 96, no 12, p. 125864-Article in journal (Refereed)
    Abstract [en]

    The ferromagnetic (FM) nature of the metallic LaCo2P2 was investigated with the positive muon spin rotation, relaxation and resonance (μ+SR) technique. Transverse and zero field μ+ SR measurements revealed that the compound enters a long range FM ground state at   K, consistent with previous studies. Based on the reported FM structure, the internal magnetic field was computed at the muon sites, which were predicted with first principles calculations. The computed result agree well with the experimental data. Moreover, although LaCo2P2 is a paramagnet at higher temperatures T > 160 K, it enters a short range ordered (SRO) magnetic phase for   K. Measurements below the vicinity of   revealed that the SRO phase co-exists with the long range FM order at temperatures 124 K  . Such co-existence is an intrinsic property and may be explained by an interplay between spin and lattice degree of freedoms.

    Download full text (pdf)
    fulltext
  • 8.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Andreica, Daniel
    Sassa, Yasmine
    Imai, Masaki
    Michioka, Chishiro
    Yoshimura, Kazuyoshi
    Guguchia, Zurab
    Shermadini, Zurab
    Khasanov, Rustem
    Sugiyama, Jun
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Pressure driven magnetic order in Sr1−xCaxCo2P2Manuscript (preprint) (Other academic)
  • 9.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Andreica, Daniel
    Babes Bolyai Univ, Fac Phys, Cluj Napoca 400084, Romania..
    Sassa, Yasmine
    Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden..
    Imai, Masaki
    Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan..
    Michioka, Chishiro
    Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan..
    Yoshimura, Kazuyoshi
    Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan..
    Guguchia, Zurab
    Paul Scherrer Inst PSI, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland..
    Shermadini, Zurab
    Paul Scherrer Inst PSI, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland..
    Khasanov, Rustem
    Paul Scherrer Inst PSI, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland..
    Sugiyama, Jun
    Comprehens Res Org Sci & Soc CROSS, Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan..
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Pressure driven magnetic order in Sr1-xCaxCo2P22022In: Scientific Reports, E-ISSN 2045-2322, Vol. 12, no 1, article id 17526Article in journal (Refereed)
    Abstract [en]

    The magnetic phase diagram of Sr1-xCaxCo2P2 as a function of hydrostatic pressure and temperature is investigated by means of high pressure muon spin rotation, relaxation and resonance (mu+SR). The weak pressure dependence for the x not equal 1- compounds suggests that the rich phase diagram of Sr1-xCaxCo2P2 as a function of x at ambient pressure may not solely be attributed to chemical pressure effects. The x = 1 compound on the other hand reveals a high pressure dependence, where the long range magnetic order is fully suppressed at p(c2) approximate to 9.8 kbar, which seem to be a first order transition. In addition, an intermediate phase consisting of magnetic domains is formed above p(c1) approximate to 8 kbar where they co-exist with a magnetically disordered state. These domains are likely to be ferromagnetic islands (FMI) and consist of an high- (FMI-(1)) and low-temperature (FMI-(2)) region, respectively, separated by a phase boundary at T-i approximate to 20 K. This kind of co-existence is unusual and is originating from a coupling between lattice and magnetic degrees of freedoms.

  • 10.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Andreica, Daniel
    Faculty of Physics, Babes-Bolyai University, 400084 Cluj-Napoca, Romania.
    Sassa, Yasmine
    Uppsala University, Department of Physics & Astronomy, SE-75121 Uppsala, Sweden.
    Nozaki, Hiroshi
    Toyota Central Research and Development Laboratories Inc., Nagakute, Aichi 480-1192, Japan.
    Umegaki, Izumi
    Toyota Central Research and Development Laboratories Inc., Nagakute, Aichi 480-1192, Japan.
    Jonsson, Viktor
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Guguchia, Zurab
    Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland.
    Shermadini, Zurab
    Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland.
    Khasanov, Rustem
    Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland.
    Isobe, Masahiko
    Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany.
    Takagi, Hidenori
    Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany.
    Ueda, Yutaka
    Toyota Physical and Chemical Research Institute, Nagakute, Aichi 480-1192, Japan.
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Sugiyama, Jun
    Toyota Central Research and Development Laboratories Inc., Nagakute, Aichi 480-1192, Japan.
    μ+SR Study of K2Cr8O16 Under Hydrostatic Pressure2018In: Journal of the Physical Society of Japan, ISSN 0031-9015, E-ISSN 1347-4073Article in journal (Refereed)
    Abstract [en]

    In this study, the magnetic ground state of the hollandite type material K2Cr8O16 was tuned by externally applied pressure and investigated using µ+SR method in Zero-field (ZF) and weak-transversefield (wTF) configurations. As a result, the obtained magnetic transition temperature for the measuredpressures differs notably from magnetization measurements. Moreover, both wTF and ZF data reveala transition between two different magnetically ordered states at low temperatures for higher pressures. Further theoretical and experimental studies are currently being planned in order to elucidatethe detailed nature of the magnetically ordered phase. 

    Download full text (pdf)
    fulltext
  • 11.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Andreica, Daniel
    Sugiyama, Jun
    Nocerino, Elisabetta
    Matsubara, Nami
    Takagi, Hidenori
    Simutis, Gediminas
    Khasanov, Rustem
    Isobe, Masahiko
    Sassa, Yasmine
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Quantum criticality in K2V8O16 under pressureManuscript (preprint) (Other academic)
  • 12.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Gauthier, Nicolas
    Matsubara, Nami
    Ong, Chin Shen
    Nocerino, Elisabetta
    Kamazawa, Kazuya
    Ikeuchi, Kazuhiko
    Mazzone, Daniel
    Eriksson, Olle
    Franck, Sibille Romain
    dos Santos, Antonio M.
    Kirkham, Melanie
    Takagi, Hidenori
    Isobe, Masahiko
    Sugiyama, Jun
    Sassa, Yasmine
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Neutron scattering on a ferromagnetic metal-insulator transition compound K2Cr8O16Manuscript (preprint) (Other academic)
  • 13.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Isobe, Masahiko
    Takagi, Hidenori
    Ofer, Oren
    Ansaldo, Eduardo J.
    Brewer, Jess H.
    Morris, Gerald
    Hitti, Bassam
    Arseneau, Donald
    Chow, Kim H.
    Sugiyama, Jun
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Tuning K2−xRbxV8O16 with chemical pressure: from a charge order stabilized quantum spin liquid to partially ordered stateManuscript (preprint) (Other academic)
  • 14.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Muons as an Optimal Probe for Future All-Solid-State Energy Devices2017In: 2017-Sustainable Industrial Processing Summit SIPS 2017: Surfaces and Interfaces(SISAM), Composite, Ceramic and Nanomaterials, 2017Conference paper (Refereed)
    Download full text (pdf)
    fulltext
  • 15.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Nocerino, Elisabetta
    Isobe, Masahiko
    Andreica, Daniel
    Cottrell, Stephen
    Takagi, Hidenori
    Sassa, Yasmine
    Sugiyama, Jun
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Charge order stabilized quantum spin liquid in the Hollandite K2V8O16Manuscript (preprint) (Other academic)
  • 16.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Nocerino, Elisabetta
    Isobe, Masahiko
    Takagi, Hidenori
    dos Santos, Antonio M.
    Sugiyama, Jun
    Sassa, Yasmine
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    High-Pressure Neutron Diffraction on Quasi-1D Hollandite K2Cr8O16Manuscript (preprint) (Other academic)
  • 17.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Nocerino, Elisabetta
    Umegaki, Izumi
    Delmas, Claude
    Koda, Akihiro
    Zubayer, Anton
    Sugiyama, Jun
    Sassa, Yasmine
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Phonon Assisted Ion Diffusion in Electrochemically cycled NaxCoO2 Manuscript (preprint) (Other academic)
  • 18.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Ohta, Hiroto
    Kyoto Univ, Engn Educ Res Ctr, Grad Sch Engn, Kyoto 6158530, Japan.;Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan..
    Kamazawa, Kazuya
    CROSS Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan..
    Stubbs, Scott L.
    Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada..
    Ofer, Oren
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada..
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Michioka, Chishiro
    Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan..
    Yoshimura, Kazuyoshi
    Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan..
    Hitti, Bassam
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada..
    Arseneau, Donald
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada..
    Morris, Gerald D.
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada..
    Ansaldo, Eduardo J.
    Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK S7N 5E2, Canada..
    Brewer, Jess H.
    Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada.;TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada..
    Sugiyama, Jun
    CROSS Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan.;Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan.;High Energy Accelerator Res Org, KEK, Tokai, Ibaraki 3191106, Japan..
    Revisiting the A-type antiferromagnet NaNiO2 with muon spin rotation measurements and density functional theory calculations2020In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 102, no 18, article id 184412Article in journal (Refereed)
    Abstract [en]

    An A-type antiferromagnet, NaNiO2, was examined by means of positive muon spin rotation and relaxation (mu+SR) measurements and first-principles calculations based on a density functional theory (DFT). Below T-N = 20 K, a clear muon spin precession signal was observed in the mu+SR time spectrum recorded under zero field, due to the formation of a static internal magnetic field. The microscopic origin of such an internal field was computed as a sum of dipolar and hyperfine contact fields at the site (0.624, 0, 0.854), where both the muon site and the local spin density at such a site were predicted with DFT calculations. While the computed values were consistent with experimentally obtained ones, in both the antiferromagnetic and the paramagnetic states, the contribution of the hyperfine contact field was shown to be insignificant even below T-N. Finally, measurements at higher temperatures signified thermally activated Na-ion diffusion with E-a = 50(20) meV and D-Na(300K) = 8.8 x 10(-11) cm(2)/s, commonly observed in layered-type compounds.

  • 19.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Ong, Chin Shen
    Mazzone, Daniel
    Uchiyama, Hiroshi
    Horio, Masafumi
    Matsubara, Nami
    Nocerino, Elisabetta
    Mukkattukavil, Deepak John
    Papadopoulos, Konstantinos
    Takagi, Hidenori
    Isobe, Masahiko
    Sugiyama, Jun
    Chang, Johan
    Sassa, Yasmine
    Eriksson, Olle
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    The origin behind the FM metal-insulator K2Cr8O16Manuscript (preprint) (Other academic)
  • 20.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Papadopoulos, Konstantinos
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Engineering.
    Nocerino, Elisabetta
    Di Berardino, Gaia
    Wang, Chennan
    Sugiyama, Jun
    Andreica, Daniel
    Vasiliev, Alexander N.
    Abdel-Hafiez, Mahmoud
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Sassa, Yasmine
    Spin dynamics in the Van der Waals magnet CrCl3Manuscript (preprint) (Other academic)
  • 21.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Papadopoulos, Konstantinos
    Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden..
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Morris, Gerald
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada..
    Hitti, Bassam
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada..
    Arseneau, Donald
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada..
    Pomjakushin, Vladimir
    Paul Scherrer Inst, Lab Neutron Scattering & Imaging, CH-5232 Villigen, Switzerland..
    Matsubara, Nami
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Orain, Jean-Christophe
    Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland..
    Svedlindh, Peter
    Uppsala Univ, Dept Mat Sci & Engn, Box 35, SE-75103 Uppsala, Sweden..
    Andreica, Daniel
    Babes Bolyai Univ, Fac Phys, Cluj Napoca 400084, Romania..
    Jana, Somnath
    Indian Assoc Cultivat Sci, Ctr Adv Mat, Kolkata 700032, India..
    Sugiyama, Jun
    Comprehens Res Org Sci & Soc CROSS, Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan..
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Sassa, Yasmine
    Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden..
    Intertwined magnetic sublattices in the double perovskite compound LaSrNiReO62020In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 102, no 14, article id 144409Article in journal (Refereed)
    Abstract [en]

    We report a muon spin rotation (mu+SR) study of the magnetic properties of the double perovskite compound LaSrNiReO6. Using the unique length and time scales of the mu+SR technique, we successfully clarify the magnetic ground state of LaSrNiReO6, which was previously deemed as a spin glass state. Instead, our mu+SR results point toward a long-range dynamically ordered ground state below T-C = 23 K, for which a static limit is foreseen at T = 0. Furthermore, between 23 K < T <= 300 K, three different magnetic phases are identified: a dense (23 K < T < 75 K), a dilute (75 K <= T <= 250 K), and a paramagnetic (T > 250 K) state. Our results reveal how two separate yet intertwined magnetic lattices interact within the unique double perovskite structure and the importance of using complementary experimental techniques to obtain a complete understanding of the microscopic magnetic properties of complex materials.

  • 22.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Sassa, Yasmine
    Papadopoulos, Konstantinos
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Engineering.
    Goko, Tatsuo
    Scheuermann, Robert Johann
    Brewer, Jess H.
    Hitti, Bassam
    Prsa, Krunoslav
    Sugiyama, Jun
    Hagiwara, Masayuki
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Short range correlations in the Tomonaga-Luttinger liquid phase of BaCo2V2O8Manuscript (preprint) (Other academic)
  • 23.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Sugiyama, Jun
    Andreica, Daniel
    Matsubara, Nami
    Nocerino, Elisabetta
    Umegaki, Izumi
    Brett, Calvin
    Roth, Stephan
    Söderberg, L. Daniel
    Hansen, Thomas
    Hoshikawa, Akinori
    Orain, Jean-Christophe
    Delmas, Claude
    Sassa, Yasmine
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Renewed magnetic phase diagram of NaxCoO2 synthesized by an electrochemical reactionManuscript (preprint) (Other academic)
  • 24.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Sugiyama, Jun
    Nocerino, Elisabetta
    Zubayer, Anton
    Palm, Rasmus
    Elson, Frank
    Matsubara, Nami
    Johansson, Fredrik O.L.
    Shikano, Masahiro
    Masese, Titus
    Guguchia, Zurab
    Morris, Gerald
    Hitti, Bassam
    Arseneau, Donald
    Andreica, Daniel
    Sassa, Yasmine
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Magnetic Order & Spin Dynamics in the Honeycomb Family A2Ni2TeO6 (A= Li, Na and K)Manuscript (preprint) (Other academic)
  • 25.
    Forslund, Ola Kenji
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Toft-Petersen, Rasmus
    Vaknin, David
    van Well, Natalija
    Telling, Mark
    Sassa, Yasmine
    Sugiyama, Jun
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Juranyi, Fanni
    Li diffusion in single crystal LiFePO4 measured by muon spin spectroscopyManuscript (preprint) (Other academic)
  • 26.
    Ge, Yuqing
    et al.
    Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden..
    Andreica, Daniel
    Univ Babes Bolyai, Fac Phys, Cluj Napoca 400084, Romania..
    Sassa, Yasmine
    Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden..
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Pomjakushina, Ekaterina
    Paul Scherrer Inst, Lab Multiscale Mat Expt, Villigen, Switzerland..
    Khasanov, Rustem
    Paul Scherrer Inst, Lab Muon Spin Spect, Villigen, Switzerland..
    Ronnow, Henrik M.
    Ecole Polytech Fed Lausanne, Lab Quantum Magnetism LQM, Lausanne, Switzerland..
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Forslund, Ola Kenji
    Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden..
    Confirming the high pressure phase diagram of the Shastry-Sutherland model2023In: Proceedings 15th International Conference on Muon Spin Rotation, Relaxation and Resonance (SR) / [ed] Prando, G Pratt, F, IOP Publishing , 2023, Vol. 2462, article id 012042Conference paper (Refereed)
    Abstract [en]

    A Muon Spin Rotation (mu+SR) study was conducted to investigate the magnetic properties of SrCu2(BO3)(2) (SCBO) as a function of temperature/pressure. Measurements in zero field and transverse field confirm the absence of long range magnetic order at high pressures and low temperatures. These measurements suggest changes in the Cu spin fluctuations characteristics above 21 kbar, consistent with the formation of a plaquette phase as previously suggested by inelastic neutron scattering measurements. SCBO is the only known realisation of the Shatry-Sutherland model, thus the ground state mediating the dimer and antiferromagnetic phase is likekly to be a plaquette state.

  • 27.
    Horio, M.
    et al.
    Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
    Hauser, K.
    Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
    Sassa, Y.
    Uppsala Univ, Dept Phys & Astron, SE-75121 Uppsala, Sweden..
    Mingazheva, Z.
    Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
    Sutter, D.
    Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
    Kramer, K.
    Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
    Cook, A.
    Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Tjernberg, Oscar
    KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Kobayashi, M.
    Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland..
    Chikina, A.
    Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland..
    Schroter, N. B. M.
    Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland..
    Krieger, J. A.
    Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland.;Swiss Fed Inst Technol, Lab Festkorperphys, CH-8093 Zurich, Switzerland..
    Schmitt, T.
    Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland..
    Strocov, V. N.
    Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland..
    Pyon, S.
    Univ Tokyo, Dept Adv Mat, Kashiwa, Chiba 2778561, Japan..
    Takayama, T.
    Univ Tokyo, Dept Adv Mat, Kashiwa, Chiba 2778561, Japan..
    Takagi, H.
    Univ Tokyo, Dept Adv Mat, Kashiwa, Chiba 2778561, Japan..
    Lipscombe, O. J.
    Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England..
    Hayden, S. M.
    Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England..
    Ishikado, M.
    CROSS, Tokai, Ibaraki 3191106, Japan..
    Eisaki, H.
    Natl Inst Adv Ind Sci & Technol, Elect & Photon Res Inst, Tsukuba 3058568, Japan..
    Neupert, T.
    Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Matt, C. E.
    Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland.;Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.;Harvard Univ, Dept Phys, Cambridge, MA 02138 USA..
    Chang, J.
    Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
    Three-Dimensional Fermi Surface of Overdoped La-Based Cuprates2018In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 121, no 7, article id 077004Article in journal (Refereed)
    Abstract [en]

    We present a soft x-ray angle-resolved photoemission spectroscopy study of overdoped high-temperature superconductors. In-plane and out-of-plane components of the Fermi surface are mapped by varying the photoemission angle and the incident photon energy. No k(z) dispersion is observed along the nodal direction, whereas a significant antinodal k(z) dispersion is identified for La-based cuprates. Based on a tight-binding parametrization, we discuss the implications for the density of states near the van Hove singularity. Our results suggest that the large electronic specific heat found in overdoped La2-xSrxCuO4 cannot be assigned to the van Hove singularity alone. We therefore propose quantum criticality induced by a collapsing pseudogap phase as a plausible explanation for observed enhancement of electronic specific heat.

  • 28.
    Jana, Somnath
    et al.
    Indian Assoc Cultivat Sci, Ctr Adv Mat, Kolkata 700032, India.;Uppsala Univ, Dept Phys & Astron, S-75236 Uppsala, Sweden.;Helmholtz Zentrum Berlin Mat & Energie, Inst Methods & Instrumentat Synchrotron Radiat Re, Albert Einstein Str 15, D-12489 Berlin, Germany..
    Aich, Payel
    Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata, India..
    Kumar, P. Anil
    Uppsala Univ, Dept Engn Sci, S-75236 Uppsala, Sweden.;Seagate Technol, 1 Disc Dr, Springtown BT48 0BF, North Ireland..
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics.
    Pomjakushin, V.
    Paul Scherrer Inst, Lab Neutron Scattering & Imaging, CH-5232 Villigen, Switzerland..
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Sassa, Y.
    Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden..
    Svedlindh, Peter
    Uppsala Univ, Dept Engn Sci, S-75236 Uppsala, Sweden..
    Karis, Olof
    Uppsala Univ, Dept Phys & Astron, S-75236 Uppsala, Sweden..
    Siruguri, Vasudeva
    Bhabha Atom Res Ctr, UGC DAE Consortium Sci Res Mumbai Ctr, 246C 2nd Floor,Common Facil Bldg CFB, Mumbai 400085, Maharashtra, India..
    Ray, Sugata
    Indian Assoc Cultivat Sci, Ctr Adv Mat, Kolkata 700032, India.;Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata, India..
    Revisiting Goodenough-Kanamori rules in a new series of double perovskites LaSr1-xCaxNiReO62019In: Scientific Reports, E-ISSN 2045-2322, Vol. 9, article id 18296Article in journal (Refereed)
    Abstract [en]

    The magnetic ground states in highly ordered double perovskites LaSr1-xCaxNiReO6 (x = 0.0, 0.5, 1.0) are studied in view of the Goodenough-Kanamori rules of superexchange interactions in this paper. In LaSrNiReO6, Ni and Re sublattices are found to exhibit curious magnetic states separately, but no long range magnetic ordering is achieved. The magnetic transition at similar to 255 K is identified with the independent Re sublattice magnetic ordering. Interestingly, the sublattice interactions are tuned by modifying the Ni-O-Re bond angles through Ca doping. Upon Ca doping, the Ni and Re sublattices start to display a ferrimagnetically ordered state at low temperature. The neutron powder diffraction data reveals long range ferrimagnetic ordering of the Ni and Re magnetic sublattices along the crystallographic b-axis. The transition temperature of the ferrimagnetic phase increases monotonically with increasing Ca concentration.

  • 29.
    Kobayashi, Shintaro
    et al.
    Nagoya Univ, Grad Sch Engn, Dept Appl Phys, Nagoya, Aichi 4648603, Japan.;SPring 8, Japan Synchrotron Radiat Res Inst, 1-1-1 Kouto, Sayo 6795198, Japan..
    Katayama, Naoyuki
    Nagoya Univ, Grad Sch Engn, Dept Appl Phys, Nagoya, Aichi 4648603, Japan..
    Manjo, Taishun
    Nagoya Univ, Grad Sch Engn, Dept Appl Phys, Nagoya, Aichi 4648603, Japan..
    Ueda, Hiroaki
    Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan..
    Michioka, Chishiro
    Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan..
    Sugiyama, Jun
    Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan.;CROSS Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan..
    Sassa, Yasmine
    Uppsala Univ, Dept Phys & Astron, Box 516, S-75120 Uppsala, Sweden.;Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden..
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Yoshimura, Kazuyoshi
    Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan.;Kyoto Univ, Res Ctr Low Temp & Mat Sci, Kyoto 6068501, Japan..
    Sawa, Hiroshi
    Nagoya Univ, Grad Sch Engn, Dept Appl Phys, Nagoya, Aichi 4648603, Japan..
    Linear Trimer Formation with Antiferromagnetic Ordering in 1T-CrSe2 Originating from Peierls-like Instabilities and Interlayer Se-Se Interactions2019In: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 58, no 21, p. 14304-14315Article in journal (Refereed)
    Abstract [en]

    Anomalous successive structural transitions in layered 1T-CrSe2 with an unusual Cr4+ valency were investigated by synchrotron X-ray diffraction. 1T-CrSe2 exhibits dramatic structural changes in in-plane Cr-Cr and interlayer Se-Se distances, which originate from two interactions: (i) in-plane Cr-Cr interactions derived from Peierls-like trimerization instabilities on the orbitally assisted one-dimensional chains and (ii) interlayer Se-Se interactions through p-p hybridization. As a result, 1T-CrSe2 has the unexpected ground state of an antiferromagnetic metal with multiple Cr linear trimers with three-center-two-electron sigma bonds. Interestingly, partial substitution of Se for S atoms in 1T-CrSe2 changes the ground state from an antiferromagnetic metal to an insulator without long-range magnetic ordering, which is due to the weakening of interlayer interactions between anions. The unique low-temperature structures and electronic states of this system are determined by the competition and cooperation of in-plane Cr-Cr and interlayer Se-Se interactions.

  • 30.
    Ma, Le Anh
    et al.
    Angstrom Lab, Dept Chem, Uppsala, Sweden..
    Palm, Rasmus
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Matsubara, Nami
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Cottrell, Stephen
    STFC Rutherford Appleton Lab, ISIS Pulsed Neutron & Muon Facil, Didcot OX11 0QX, Oxon, England..
    Yokoyama, Koji
    STFC Rutherford Appleton Lab, ISIS Pulsed Neutron & Muon Facil, Didcot OX11 0QX, Oxon, England..
    Koda, Akihiro
    High Energy Accelerator Res Org KEK, Tokai, Ibaraki 3191106, Japan..
    Sugiyama, Jun
    Comprehens Res Org Sci & Soc CROSS, Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan.;Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan..
    Sassa, Yasmine
    Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden..
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Younesi, Reza
    Angstrom Lab, Dept Chem, Uppsala, Sweden..
    Na-ion mobility in P2-type Na0.5MgxNi0.17-xMn0.83O2 (0 <= x <= 0.07) from electrochemical and muon spin relaxation studies2021In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 23, no 42, p. 24478-24486Article in journal (Refereed)
    Abstract [en]

    Sodium transition metal oxides with a layered structure are one of the most widely studied cathode materials for Na+-ion batteries. Since the mobility of Na+ in such cathode materials is a key factor that governs the performance of material, electrochemical and muon spin rotation and relaxation techniques are here used to reveal the Na+-ion mobility in a P2-type Na0.5MgxNi0.17-xMn0.83O2 (x = 0, 0.02, 0.05 and 0.07) cathode material. Combining electrochemical techniques such as galvanostatic cycling, cyclic voltammetry, and the galvanostatic intermittent titration technique with mu+SR, we have successfully extracted both self-diffusion and chemical-diffusion under a potential gradient, which are essential to understand the electrode material from an atomic-scale viewpoint. The results indicate that a small amount of Mg substitution has strong effects on the cycling performance and the Na+ mobility. Amongst the tested cathode systems, it was found that the composition with a Mg content of x = 0.02 resulted in the best cycling stability and highest Na+ mobility based on electrochemical and mu+SR results. The current study clearly shows that for developing a new generation of sustainable energy-storage devices, it is crucial to study and understand both the structure as well as dynamics of ions in the material on an atomic level.

  • 31.
    Matsubara, Nami
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Masese, Titus
    Suard, Emmanuelle
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Palm, Rasmus
    KTH, School of Engineering Sciences (SCI), Applied Physics.
    Guguchia, Zurab
    Andreica, Daniel
    Hardut, Alexandra
    Ishikado, Motoyuki
    Papadopoulos, Konstantinos
    Sassa, Yasmine
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Cation Distributions and Magnetic Properties of Ferrispinel MgFeMnO42020In: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 59, no 24, p. 17970-17980Article in journal (Refereed)
    Abstract [en]

    The crystal structure and magnetic properties of the cubic spinel MgFeMnO4 were studied by using a series of in-house techniques along with large-scale neutron diffraction and muon spin rotation spectroscopy in the temperature range between 1.5 and 500 K. The detailed crystal structure is successfully refined by using a cubic spinel structure described by the space group Fd (3) over barm. Cations within tetrahedral A and octahedral B sites of the spinel were found to be in a disordered state. The extracted fractional site occupancies confirm the presence of antisite defects, which are of importance for the electrochemical performance of MgFeMnO4 and related battery materials. Neutron diffraction and muon spin spectroscopy reveal a ferrimagnetic order below T-C = 394.2 K, having a collinear spin arrangement with antiparallel spins at the A and B sites, respectively. Our findings provide new and improved understanding of the fundamental properties of the ferrispinel materials and of their potential applications within future spintronics and battery devices.

  • 32.
    Matsubara, Nami
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Zubayer, Anton
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Papadopoulos, Konstantinos
    Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden..
    Andreica, Daniel
    Babes Bolyai Univ, Fac Phys, Cluj Napoca 400084, Romania..
    Sugiyama, Jun
    Comprehens Res Org Sci & Soc CROSS, Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan..
    Palm, Rasmus
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Guguchia, Zurab
    Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland..
    Cottrell, Stephen P.
    Rutherford Appleton Lab, ISIS Muon Facil, Didcot OX11 0QX, Oxon, England..
    Kamiyama, Takashi
    High Energy Accelerator Res Org, Inst Mat Struct Sci, 203-1 Shirakata, Tokai, Ibaraki 3191106, Japan..
    Saito, Takashi
    High Energy Accelerator Res Org, Inst Mat Struct Sci, 203-1 Shirakata, Tokai, Ibaraki 3191106, Japan..
    Kalaboukhov, Alexei
    Chalmers Univ Technol, Microtechnol & Nanosci, S-41296 Gothenburg, Sweden..
    Sassa, Yasmine
    Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden..
    Masese, Titus
    Natl Inst Adv Ind Sci & Technol, Res Inst Electrochem Energy RIECEN, Dept Energy & Environm, Ikeda, Osaka 5638577, Japan.;Natl Inst Adv Ind Sci & Technol, AIST Kyoto Univ Chem Energy Mat Open Innovat Lab, Sakyo Ku, Kyoto 6068501, Japan..
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Magnetism and ion diffusion in honeycomb layered oxide K2Ni2TeO62020In: Scientific Reports, E-ISSN 2045-2322, Vol. 10, no 1, article id 18305Article in journal (Refereed)
    Abstract [en]

    In the quest for developing novel and efficient batteries, a great interest has been raised for sustainable K-based honeycomb layer oxide materials, both for their application in energy devices as well as for their fundamental material properties. A key issue in the realization of efficient batteries based on such compounds, is to understand the K-ion diffusion mechanism. However, investigation of potassium-ion (K+) dynamics in materials using e.g. NMR and related techniques has so far been very challenging, due to its inherently weak nuclear magnetic moment, in contrast to other alkali ions such as lithium and sodium. Spin-polarised muons, having a high gyromagnetic ratio, make the muon spin rotation and relaxation (mu+SR) technique ideal for probing ions dynamics in these types of energy materials. Here we present a study of the low-temperature magnetic properties as well as K+ dynamics in honeycomb layered oxide material K2Ni2TeO6 using mainly the mu+SR technique. Our low-temperature mu+SR results together with complementary magnetic susceptibility measurements find an antiferromagnetic transition at T-N approximate to 27 K. Further mu+SR studies performed at higher temperatures reveal that potassium ions (K+) become mobile above 200 K and the activation energy for the diffusion process is obtained as E-a = 121(13) meV. This is the first time that K+ dynamics in potassium-based battery materials has been measured using mu+SR. Assisted by high-resolution neutron diffraction, the temperature dependence of the K-ion self diffusion constant is also extracted. Finally our results also reveal that K-ion diffusion occurs predominantly at the surface of the powder particles. This opens future possibilities for potentially improving ion diffusion as well as K-ion battery device performance using nano-structuring and surface coatings of the particles.

  • 33.
    Matsubara, Nami
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Kamazawa, K.
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Sassa, Y.
    Keller, L.
    Sikolenko, V. V.
    Pomjakushin, V.
    Sakurai, H.
    Sugiyama, J.
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Neutron powder diffraction study of NaMn2O4 and Li0.92Mn2O4 : Insights on spin-charge-orbital ordering2020In: Physical Review Research, E-ISSN 2643-1564, Vol. 2, no 4, article id 043143Article in journal (Refereed)
    Abstract [en]

    High-pressure synthesized quasi-one-dimensional NaMn2O4 and Li0.92Mn2O4 are both antiferromagnetic insulators. Here their atomic and magnetic structures are investigated using neutron powder diffraction. The present crystal structural analyses of NaMn2O4 reveal that a Mn3+/Mn4+ charge-ordering state exists even at low temperature (down to 1.5 K). It is evident that one of the Mn sites shows a strongly distorted Mn3+ octahedron due to the Jahn-Teller effect. Above TN=35 K, a two-dimensional short-range correlation is observed, as indicated by asymmetric diffuse scattering. Below TN, two antiferromagnetic transitions are observed: (i) a commensurate long-range Mn3+ spin ordering below TN1=35 K and (ii) an incommensurate Mn4+ spin ordering below TN2=11 K. Surprisingly, the two antiferromagnetic orders are found to be independent of each other. The commensurate magnetic structure (kC=0.5,0.5,0.5) follows the magnetic anisotropy of the local easy axes of Mn3+, while the incommensurate Mn4+ one shows a spin-density-wave or a cycloidal order with kIC=(0,0,0.216). For Li0.92Mn2O4, on the other hand, the absence of a long-range spin-ordered state is confirmed down to 1.5 K.

  • 34.
    Miniotaite, Ugne
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Forslund, Ola Kenji
    Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden..
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Elson, Frank
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Palm, Rasmus
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Matsubara, Nami
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Ge, Yuqing
    Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden..
    Khasanov, Rustem
    Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland..
    Kobayashi, Genki
    RIKEN, Solid State Chem Lab, Cluster Pioneering Res CPR, 2-1 Hirosawa, Wako, Saitama 3510198, Japan.;Natl Inst Nat Sci, Inst Mol Sci, Dept Mat Mol Sci, 38 Nishigonaka, Okazaki, Aichi 4448585, Japan..
    Sassa, Yasmine
    Department of Physics, Chalmers University of Technology, Göteborg, SE-412 96, Sweden .
    Weissenrieder, Jonas
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Pomjakushin, Vladimir
    Paul Scherrer Inst, Lab Neutron Scattering Imaging, CH-5232 Villigen, Switzerland..
    Andreica, Daniel
    Univ Babes Bolyai, Fac Phys, Cluj Napoca 400084, Romania..
    Sugiyama, Jun
    Comprehens Res Org Sci & Soc CROSS, Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan..
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Magnetic Properties of Multifunctional (LiFePO4)-Li-7 under Hydrostatic Pressure2023In: Proceedings 15th International Conference on Muon Spin Rotation, Relaxation and Resonance (SR) / [ed] Prando, G Pratt, F, IOP Publishing , 2023, Vol. 2462, article id 012049Conference paper (Refereed)
    Abstract [en]

    LiFePO4 (LFPO) is an archetypical and well-known cathode material for rechargeable Li-ion batteries. However, its quasi-one-dimensional (Q1D) structure along with the Fe ions, LFPO also displays interesting low-temperature magnetic properties. Our team has previously utilized the muon spin rotation (mu+SR) technique to investigate both magnetic spin order as well as Li-ion diffusion in LFPO. In this initial study we extend our investigation and make use of high-pressure mu+SR to investigate effects on the low-T magnetic order. Contrary to theoretical predictions we find that the magnetic ordering temperature as well as the ordered magnetic moment increase at high pressure (compressive strain).

  • 35.
    Månsson, Martin
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Nozaki, Hiroshi
    Toyota Central Research and Development Laboratories, Inc., Nagakute, Aichi 480-1192, Japan.
    Umegaki, Izumi
    Toyota Central Research and Development Laboratories, Inc., Nagakute, Aichi 480-1192, Japan.
    Shiraki, Susumu
    Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
    Hitosugi, Taro
    Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
    Prokscha, Thomas
    Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland.
    Salman, Zaher
    Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland.
    Suter, Andreas
    Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland.
    Sassa, Yasmine
    Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden.
    Sugiyama, Jun
    Toyota Central Research and Development Laboratories, Inc., Nagakute, Aichi 480-1192, Japan.
    LE-\(\mu ^{ + }\)SR Study of Superconductivity in the Thin Film Battery Material LiTi2O42018In: Journal of the Physical Society of Japan, ISSN 0031-9015, E-ISSN 1347-4073Article in journal (Refereed)
    Download full text (pdf)
    fulltext
  • 36.
    Nocerino, Elisabetta
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Forslund, Ola Kenji
    Sakurai, Hiroya
    Hoshikawa, Akinori
    Matsubara, Nami
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Andreica, Daniel
    Zubayer, Anton
    Mazza, Federico
    Orain, Jean-Christophe
    Saito, Takashi
    Sugiyama, Jun
    Umegaki, Izumi
    Sassa, Yasmine
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Revised Magnetic structure and tricritical behavior of the CMR Compound NaCr2O4 investigated with High Resolution Neutron Diffraction and μ+SR.Manuscript (preprint) (Other academic)
  • 37.
    Nocerino, Elisabetta
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Sakurai, Hiroya
    Matsubara, Nami
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Zubayer, Anton
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Mazza, Federico
    Cottrell, Stephen
    Koda, Akihiro
    Watanabe, Isao
    Hoshikawa, Akinori
    Saito, Takashi
    Sugiyama, Jun
    Sassa, Yasmine
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Na-ion Dynamics in the Solid Solution NaxCa1-xCr2O4 Studied by Muon Spin Rotation and Neutron DiffractionManuscript (preprint) (Other academic)
    Abstract [en]

    In this work we present systematic set of measurements carried out by muon spin rotation/relaxation (μ+SR) and neutron powder diffraction (NPD) on the solid solution NaxCa1−xCr2O4. This study investigates Na-ion dynamics in the quasi-1D (Q1D) diffusion channels created by the honeycomb-like arrangement of CrO6 octahedra, in the presence of defects introduced by Ca doping. With increasing Ca content, the size of the diffusion channels is enlarged, however, this effect does not enhance the Na ion mobility. Instead the overall diffusivity is hampered by the local defects and the Na hopping probability is lowered. The diffusion mechanism in NaxCa1−xCr2O4 was found to be interstitial and the activation energy as well as diffusion coefficient were determined for all the members of the solid solution. 

  • 38.
    Nocerino, Elisabetta
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Wang, Chennan
    Sakurai, Hiroya
    Elson, Frank
    Palm, Rasmus
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Miniotaite, Ugne
    Ge, Yuqing
    Sassa, Yasmine
    Sugiyama, Jun
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Magnetic nature of wolframite MgReO4In: ISSN 2165-5286Article in journal (Other academic)
  • 39.
    Nocerino, Elisabetta
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Kobayashi, Shintaro
    Witteveen, Catherine
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Matsubara, Nami
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Tang, Chiu
    Matsukawa, Takeshi
    Hoshikawa, Akinori
    Koda, Akihiro
    Yoshimura, Kazuyoshi
    Umegaki, Izumi
    Sassa, Yasmine
    von Rohr, Fabian
    Pomjakushin, Vladimir
    Brewer, Jess
    Sugiyama, Jun
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    The Duel of Magnetic Interactions and Structural Instabilities: Itinerant Frustration in the Triangular Lattice Compound LiCrSe2Manuscript (preprint) (Other academic)
    Abstract [en]

    The recent synthesis of the chromium selenide compound LiCrSe2 constitutes a valuable addition to the ensemble of two-dimensional triangular lattice antiferromagnets (2D-TLA). In this work we present the very first comprehensive study of the combined low temperature nuclear and magnetic structure established in this material. Details on the connection between Li-ion dynamics and structural changes are also presented along with a direct link between atomic structure and spin order via a strong magnetoelastic coupling. LiCrSe2 was found to undergo a first order structural transition from a trigonal crystal system with space group P3¯m1 to a monoclinic one with space group C2/m at Ts=30~K. Such restructuring of the lattice is accompanied by a magnetic transition at TN=30~K, with the formation of a complex spin arrangement for the Cr3+ moments. Refinement of the magnetic structure with neutron diffraction data and complementary muon spin rotation analysis reveal the presence of two incommensurate magnetic domains with a up-up-down-down arrangement of the spins with ferromagnetic (FM) double chains coupled antiferromagnetically (AFM). In addition to this unusual arrangement, the spin axial vector is modulated both in direction and modulus, resulting in a spin density wave-like order with periodic suppression of the Cr moment along the chains. This behavior is believed to appear as a result of strong competition between direct exchange AFM and superexchange FM couplings established between both nearest neighbor and next nearest neighbor Cr3+ ions. We finally conjecture that the resulting magnetic order is stabilized via subtle vacancy/charge order within the Li layers, potentially causing a mix of two different magnetic phases within the sample.

  • 40.
    Nocerino, Elisabetta
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Sakurai, Hiroya
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Papadopoulos, Konstantinos
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Engineering.
    Mukkattukavil, Deepak
    Matsubara, Nami
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Andreica, Daniel
    Nozaki, Hiroshi
    Simutis, Gediminas
    Khassanov, Roustem
    Orain, Jean-Christophe
    Ishimatsu, Naoki
    Kawamura, Naomi
    Bull, Craig
    Funnell, Nick
    Sugiyama, Jun
    Umegaki, Izumi
    Sassa, Yasmine
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Pressure Dependent Magnetic properties of the Q1D Solid Solution Ca1-xNaxCr2O4 Studied with Neutrons Muons and X-RaysManuscript (preprint) (Other academic)
  • 41.
    Nocerino, Elisabetta
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Sassa, Yasmine
    Suter, Andreas
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Andreica, Daniel
    Nozaki, Hiroshi
    Umegaki, Izumi
    Imazeki, Daisuke
    Nishio, Kazunori
    Hitosugi, Taro
    Prokscha, Thomas
    Salman, Zaher
    Sugiyama, Jun
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Superconducting Properties of the Thin Film LiTi2O4 Spinel Compound Investigated by Low-Energy µ+SRManuscript (preprint) (Other academic)
  • 42.
    Nocerino, Elisabetta
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Sugiyama, Jun
    Brewer, Jess
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Umegaki, Izumi
    Nozaki, Hiroshi
    Kobayashi, Shintaro
    Yoshimura, Kazuyoshi
    Sassa, Yasmine
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Cr-Cr Distance and Magnetism in the Novel Triangular Lattice Antiferromangets LiCrSe2, LiCrTe2 and NaCrTe2: a systematic µ+SR studyManuscript (preprint) (Other academic)
  • 43.
    Nocerino, Elisabetta
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Witteveen, C.
    Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211, Geneva 4, Switzerland, 24 Quai Ernest-Ansermet; Department of Physics, University of Zürich, Winterthurerstr. 190, 8057, Zurich, Switzerland, Winterthurerstr. 190.
    Kobayashi, S.
    Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo, 679-5198, Japan, 1-1-1 Kouto.
    Forslund, Ola Kenji
    Department of Physics, Chalmers University of Technology, 412 96, Göteborg, Sweden.
    Matsubara, Nami
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Zubayer, A.
    Department of Physics, Chemistry and Biology (IFM), Linköping University, 581 83, Linköping, Sweden.
    Mazza, F.
    Insitute of Solid State Physics, TU Wien, Wiedner Haupstraße 8-10, 1040, Vienna, Austria, Wiedner Haupstraße 8-10.
    Kawaguchi, S.
    Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo, 679-5198, Japan, 1-1-1 Kouto.
    Hoshikawa, A.
    Frontier Research Center for Applied Atomic Sciences, Ibaraki University, 162-1 Shirakata, Tokai, Ibaraki, 319-1106, Japan, 162-1 Shirakata, Ibaraki.
    Umegaki, I.
    Muon Science Laboratory, Institute of Materials Structure Science, KEK, Tokai, Ibaraki, 319-1106, Japan, Ibaraki.
    Sugiyama, J.
    Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), Tokai, Ibaraki, 319-1106, Japan, Ibaraki; Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan, Ibaraki.
    Yoshimura, K.
    Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, 606-8502, Japan.
    Sassa, Y.
    Department of Physics, Chalmers University of Technology, 412 96, Göteborg, Sweden.
    von Rohr, F. O.
    Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211, Geneva 4, Switzerland, 24 Quai Ernest-Ansermet.
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Nuclear and magnetic spin structure of the antiferromagnetic triangular lattice compound LiCrTe2 investigated by μ+SR, neutron and X-ray diffraction2022In: Scientific Reports, E-ISSN 2045-2322, Vol. 12, no 1, article id 21657Article in journal (Refereed)
    Abstract [en]

    Two-dimensional (2D) triangular lattice antiferromagnets (2D-TLA) often manifest intriguing physical and technological properties, due to the strong interplay between lattice geometry and electronic properties. The recently synthesized 2-dimensional transition metal dichalcogenide LiCrTe2, being a 2D-TLA, enriched the range of materials which can present such properties. In this work, muon spin rotation (μ+SR) and neutron powder diffraction (NPD) have been utilized to reveal the true magnetic nature and ground state of LiCrTe2. From high-resolution NPD the magnetic spin order at base-temperature is not, as previously suggested, helical, but rather collinear antiferromagnetic (AFM) with ferromagnetic (FM) spin coupling within the ab-plane and AFM coupling along the c-axis. The value if the ordered magnetic Cr moment is established as μCr=2.36μB. From detailed μ+SR measurements we observe an AFM ordering temperature TN≈ 125 K. This value is remarkably higher than the one previously reported by magnetic bulk measurements. From μ+SR we are able to extract the magnetic order parameter, whose critical exponent allows us to categorize LiCrTe2 in the 3D Heisenberg AFM universality class. Finally, by combining our magnetic studies with high-resolution synchrotron X-ray diffraction (XRD), we find a clear coupling between the nuclear and magnetic spin lattices. This suggests the possibility for a strong magnon–phonon coupling, similar to what has been previously observed in the closely related compound LiCrO2.

  • 44.
    Nocerino, Elisabetta
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Witteveen, Catherine
    Kobayashi, Shintaro
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Matsubara, Nami
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Zubayer, Anton
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Mazza, Federico
    Kawaguchi, Shogo
    Hoshikawa, Akinori
    Umegaki, Izumi
    Sugiyama, Jun
    Yoshimura, Kazuyoshi
    Sassa, Yasmine
    von Rohr, Fabian
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Nuclear and magnetic spin structure of the antiferromagnetic triangular lattice compound LiCrTe2 investigated by µ+SR, neutron and X-ray diffractionManuscript (preprint) (Other academic)
    Abstract [en]

    Two−dimensional (2D) triangular lattices antiferromagnets (2D−TLA) often manifest intriguing physical and technological properties, due to the strong interplay between lattice geometry and electronic properties. The recently synthesized 2−dimensional transition metal dichalcogenide LiCrTe2, being a 2D−TLA, enriched the range of materials which can present such properties. In this work, muon spin rotation (μ+SR) and neutron powder diffraction (NPD) have been utilized to reveal the true magnetic nature and ground state of LiCrTe2. From high−resolution NPD the magnetic spin order at base−temperature is not, as previously suggested, helical, but rather collinear antiferromagnetic (AFM) with ferromagnetic (FM) spin coupling within the ab−plane and AFM coupling along the c−axis. The ordered magnetic Cr moment is established as μCr= 2.36 μB. From detailed μ+SR measurements we observe an AFM ordering temperature TN≈ 125 K. This value is remarkably higher than the one previously reported by magnetic bulk measurements. From μ+SR we are able to extract the magnetic order parameter, whose critical exponent allows us to categorize LiCrTe2 in the 3D Heisenberg AFM universality class. Finally, by combining our magnetic studies with high−resolution synchrotron X−ray diffraction (XRD), we find a clear coupling between the nuclear and magnetic spin lattices. This suggests the possibility for a strong magnon−phonon coupling, similar to what has been previously observed in the closely related compound LiCrO2.

  • 45.
    Ohishi, Kazuki
    et al.
    Comprehens Res Org Sci & Soc CROSS, Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan..
    Ohta, Hiroto
    Doshisha Univ, Fac Sci & Engn, I-3 Tatara Miyakodani, Kyoto 6100321, Japan..
    Kato, Yusuke
    Tokyo Univ Agr & Technol, Dept Appl Phys, 2-24-16 Naka Cho, Koganei, Tokyo 1848588, Japan..
    Katori, Hiroko Aruga
    Tokyo Univ Agr & Technol, Dept Appl Phys, 2-24-16 Naka Cho, Koganei, Tokyo 1848588, Japan..
    Forslund, Ola Kenji
    Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden..
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Matsubara, Nami
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Konstantinos, Papadopoulos
    Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden..
    Johansson, Fredrik
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Applied Physical Chemistry. Angstromlaboratoriet, Dept Phys & Astron, SE-75120 Uppsala, Sweden..
    Sassa, Yasmine
    Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden..
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Hitti, Bassam
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada..
    Arseneau, Donald
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada..
    Morris, Gerald D.
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada..
    Brewer, Jess H.
    Univ British Columbia, Dept Phys Astron, Vancouver, BC V6T IZ1, Canada..
    Sugiyama, Jun
    Comprehens Res Org Sci & Soc CROSS, Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan..
    The internal magnetic field in a ferromagnetic compound Y2Co12P72023In: Proceedings 15th International Conference on Muon Spin Rotation, Relaxation and Resonance (SR) / [ed] Prando, G Pratt, F, IOP Publishing , 2023, Vol. 2462, article id 012008Conference paper (Refereed)
    Abstract [en]

    The internal magnetic field in a ferromagnetic compound, Y2Co12P7 with T-C = 150 K, was studied with mu(+) SR using a powder sample down to 2 K. The wTF-mu(+) SR measurements revealed the presence of a sharp magnetic transition at T-C = 151 K, and the ZF-mu(+) SR measurements clarified the formation of static magnetic order below T-C. The presence of two muon spin precession signals in the ZF-mu(+) SR spectrum below TC indicates the existence of the two different muon sites in the lattice. By considering the muon sites and local spin densities at the muon sites predicted with DFT calculations, the ordered magnetic moments of Co were successfully determined.

  • 46.
    Palm, Rasmus
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics.
    Tuul, Kenneth
    Univ Tartu, Inst Chem, Ravila 14a, EE-50411 Tartu, Estonia..
    Elson, Frank
    KTH, School of Engineering Sciences (SCI), Applied Physics.
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics.
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics.
    Hansen, Thomas C.
    Inst Laue Langevin, 71 Ave Martyrs,CS 20156, F-38042 Grenoble 9, France..
    Aruvali, Jaan
    Univ Tartu, Inst Ecol & Earth Sci, Vanemuise 46, EE-51014 Tartu, Estonia..
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics.
    In situ neutron diffraction of NaAlD4/carbon black composites during decomposition/deuteration cycles and the effect of carbon on phase segregation2022In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 47, no 80, p. 34195-34204Article in journal (Refereed)
    Abstract [en]

    The influence on the decomposition and reforming of the hydrogen storage material NaAlH4 by adding relatively low amounts of mesoporous carbon black is investigated with in situ diffraction. A 60:40 NaAlH4/carbon black composite is prepared via ball milling and characterised ex situ via X-ray diffraction, gas adsorption, temperature-programmed decomposition, and dehydrogenation/hydrogenation cycling methods. The prepared composite is deuterated, and the crystalline phase composition is determined with in situ neutron powder diffraction method during multiple decomposition/deuteration cycles. Changes in the crystalline phase composition start slightly below the melting temperature of the pristine alanate, whereas the release of deuterium starts at considerably lower temperatures. The decomposition of Na3AlD6 to NaD is almost completely reversible at the applied low deuterium pressures of >= 2 MPa. Thus, the strong effect of even low concen-trations of a mesoporous carbon black on the capability to store H2 reversibly is showcased and analysed in-depth.

  • 47.
    Papadopoulos, Konstantinos
    et al.
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Engineering.
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Nocerino, Elisabetta
    Johansson, Fredrik O.L
    Simutis, Gediminas
    Matsubara, Nami
    Morris, Gerald
    Hitti, Bassam
    Arseneau, Donald
    Orain, Jean-Christophe
    Pomjakushin, Vladimir
    Jana, Somnath
    Svedlindh, Peter
    Andreica, Daniel
    Börjesson, Lars
    Sugiyama, Jun
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Sassa, Yasmine
    Influence of the Magnetic Sub-Lattices in the Double Perovskite Compound LaCaNiReO6Manuscript (preprint) (Other academic)
  • 48.
    Papadopoulos, Konstantinos
    et al.
    Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden..
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics. Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden..
    Nocerino, Elisabetta
    KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.
    Johansson, Fredrik
    KTH, School of Engineering Sciences (SCI), Applied Physics. Uppsala Univ, Div Mol & Condensed Matter Phys, S-75237 Uppsala, Sweden.;Sorbonne Univ, Inst Nanosci Paris, UMR CNRS 7588, F-75005 Paris, France..
    Simutis, Gediminas
    Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden.;Paul Scherrer Inst, Lab Neutron & Muon Instrumentat, CH-5232 Villigen, Switzerland..
    Matsubara, Nami
    KTH, School of Engineering Sciences (SCI), Applied Physics.
    Morris, Gerald
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC 623, Canada..
    Hitti, Bassam
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC 623, Canada..
    Arseneau, Donald
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC 623, Canada..
    Svedlindh, Peter
    Uppsala Univ, Dept Mat Sci & Engn, S-75103 Uppsala, Sweden..
    Medarde, Marisa
    Paul Scherrer Inst, Lab Multiscale Mat Expt, CH-5232 Villigen, Switzerland..
    Andreica, Daniel
    Babes Bolyai Univ, Fac Phys, Cluj Napoca 400084, Cluj, Romania..
    Orain, Jean-Christophe
    Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland..
    Pomjakushin, Vladimir
    Paul Scherrer Inst, Lab Neutron Scattering & Imaging, CH-5232 Villigen, Switzerland..
    Börjesson, Lars
    Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden..
    Sugiyama, Jun
    Uppsala Univ, Div Mol & Condensed Matter Phys, S-75237 Uppsala, Sweden.;Comprehens Res Org Sci & Soc CROSS, Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan..
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics.
    Sassa, Yasmine
    Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden..
    Influence of the magnetic sublattices in the double perovskite LaCaNiReO62022In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 106, no 21, article id 214410Article in journal (Refereed)
    Abstract [en]

    The magnetism of double perovskites is a complex phenomenon, determined from intra- or interatomic magnetic moment interactions, and strongly influenced by geometry. We take advantage of the complementary length and timescales of the muon spin rotation, relaxation, and resonance (mu+SR) microscopic technique and bulk ac/dc magnetic susceptibility measurements to study the magnetic phases of the LaCaNiReO6 double perovskite. As a result, we are able to discern and report ferrimagnetic ordering below TC = 102 K and the formation of different magnetic domains above TC. Between TC < T < 270 K, the following two magnetic environments appear, a dense spin region and a static-dilute spin region. The paramagnetic state is obtained only above T > 270 K. An evolution of the interaction between Ni and Re magnetic sublattices, in this geometrically frustrated fcc perovskite structure, is revealed as a function of temperature through the critical behavior and thermal evolution of microscopic and macroscopic physical quantities.

  • 49.
    Sassa, Y.
    et al.
    Uppsala Univ, Dept Phys & Astron, Box 530, S-75121 Uppsala, Sweden.;Paul Scherrer Inst, Lab Neutron Scattering & Imaging, CH-5232 Villigen, Switzerland..
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Material Physics, MF.
    Forslund, Ola K
    KTH, School of Engineering Sciences (SCI), Applied Physics, Material Physics, MF.
    Tjernberg, Oscar
    KTH, School of Engineering Sciences (SCI), Applied Physics, Material Physics, MF.
    Pomjakushin, V.
    Paul Scherrer Inst, Lab Neutron Scattering & Imaging, CH-5232 Villigen, Switzerland..
    Ofer, O.
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada..
    Ansaldo, E. J.
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada..
    Brewer, J. H.
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada..
    Umegaki, I.
    Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan..
    Higuchi, Y.
    Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan..
    Ikedo, Y.
    Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan.;KEK, Muon Sci Lab, Tsukuba, Ibaraki 3050801, Japan..
    Nozaki, H.
    Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan..
    Harada, M.
    Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan..
    Watanabe, I.
    RIKEN Nishina Ctr, Adv Meson Sci Lab, 2-1 Hirosawa, Wako, Saitama 3510198, Japan..
    Sakurai, H.
    Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan..
    Sugiyama, J.
    Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan..
    The metallic quasi-1D spin-density-wave compound NaV2O4 studied by angle-resolved photoelectron spectroscopy2018In: Journal of Electron Spectroscopy and Related Phenomena, ISSN 0368-2048, E-ISSN 1873-2526, Vol. 224, p. 79-83Article in journal (Refereed)
    Abstract [en]

    Angle-resolved photoelectron spectroscopy has been used to follow the valence band and near Fermi edge electronic band structure in the quasi-1D compound NaV2O4. In this current study we have acquired the very first high-quality, high-resolution ARPES data from this material. Our data clearly reveal two distinct dispersive bands that cross the Fermi level at different k(F). This is a clear signature that the electronic properties of this material is affected by the presence of a mixed valence state on the different vanadium chains and possibly also the low-temperature magnetic spin order.

  • 50.
    Sassa, Yasmine
    et al.
    Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden.
    Umegaki, Izumi
    Toyota Central Research &amp; Development Laboratories, Inc., Nagakute, Aichi 480-1192, Japan.
    Nozaki, Hiroshi
    Toyota Central Research &amp; Development Laboratories, Inc., Nagakute, Aichi 480-1192, Japan.
    Forslund, Ola Kenji
    KTH, School of Engineering Sciences (SCI), Applied Physics, Material Physics, MF.
    Delmas, Claude
    ICMCB-CNRS, 87 Avenue Dr. A. Schweitzer, 33608 Pessac cedex, France.
    Orain, Jean Christophe
    Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland.
    Amato, Alex
    Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland.
    Andreica, Daniel
    Faculty of Physics, Babes-Bolyai University, 400084 Cluj-Napoca, Romania.
    Månsson, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Material Physics, MF.
    Sugiyama, Jun
    Toyota Central Research &amp; Development Laboratories, Inc., Nagakute, Aichi 480-1192, Japan.
    Investigation of the Magnetic Properties of Na0.7CoO2 Prepared by Electrochemical Reaction2018In: JPS Conf. Proc. 21, 011019 (2018) [5 pages] Proceedings of the 14th International Conference on Muon Spin Rotation, Relaxation and Resonance (μSR2017), Physical Society of Japan , 2018Conference paper (Refereed)
    Abstract [en]

    We report a muon spin rotation and relaxation (μ+SR) study on Na0.7CoO2 powder samples, where the sodium (Na) has been intercalated via an electrochemical reaction inside a Na-ion battery. The zero field μ+SR measurement at T = 2 K shows a paramagnetic state for the as-grown sample whereas an antiferromagnetic (AF) ordered state is seen for the electrochemically cycled one. Furthermore, the temperature dependence of the muon-spin precession frequencies reveals a Néel transition temperature of TN = 22 K. The results demonstrate the importance of having high-quality homogenous samples, and put the existing NaxCoO2 magnetic phase diagram under debate.

    Download full text (pdf)
    fulltext
12 1 - 50 of 62
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf