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Spin relaxation signature of colossal magnetic anisotropy in platinum atomic chains
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics.ORCID iD: 0000-0003-0210-4340
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics. Univ Iceland, Iceland.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics. KTH, Centres, SeRC - Swedish e-Science Research Centre. Uppsala Univ, Sweden.ORCID iD: 0000-0001-7788-6127
2016 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 6, article id 36872Article in journal (Refereed) Published
Abstract [en]

Recent experimental data demonstrate emerging magnetic order in platinum atomically thin nanowires. Furthermore, an unusual form of magnetic anisotropy-colossal magnetic anisotropy (CMA)-was earlier predicted to exist in atomically thin platinum nanowires. Using spin dynamics simulations based on first-principles calculations, we here explore the spin dynamics of atomically thin platinum wires to reveal the spin relaxation signature of colossal magnetic anisotropy, comparing it with other types of anisotropy such as uniaxial magnetic anisotropy (UMA). We find that the CMA alters the spin relaxation process distinctly and, most importantly, causes a large speed-up of the magnetic relaxation compared to uniaxial magnetic anisotropy. The magnetic behavior of the nanowire exhibiting CMA should be possible to identify experimentally at the nanosecond time scale for temperatures below 5 K. This time-scale is accessible in e.g., soft x-ray free electron laser experiments.

Place, publisher, year, edition, pages
Nature Publishing Group, 2016. Vol. 6, article id 36872
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-198960DOI: 10.1038/srep36872ISI: 000387564100001PubMedID: 27841287Scopus ID: 2-s2.0-84995389822OAI: oai:DiVA.org:kth-198960DiVA, id: diva2:1065586
Funder
Swedish e‐Science Research CenterSwedish Research CouncilThe Royal Swedish Academy of SciencesKnut and Alice Wallenberg FoundationSwedish Energy AgencySwedish Foundation for Strategic Research Carl Tryggers foundation eSSENCE - An eScience CollaborationGöran Gustafsson Foundation for promotion of scientific research at Uppala University and Royal Institute of Technology
Note

QC 20170116

Available from: 2017-01-16 Created: 2016-12-22 Last updated: 2017-11-29Bibliographically approved

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Hellsvik, JohanBessarab, Pavel F.Delin, Anna

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