Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Pulsed Laser Deposited Y3Fe5O12 Films for Magnetostatic Wave Band Pass Filters
KTH, Skolan för informations- och kommunikationsteknik (ICT), Materialfysik.
KTH, Skolan för informations- och kommunikationsteknik (ICT), Materialfysik.
KTH, Skolan för informations- och kommunikationsteknik (ICT), Materialfysik.ORCID-id: 0000-0001-8774-9302
KTH, Skolan för informations- och kommunikationsteknik (ICT), Materialfysik.
2009 (engelsk)Inngår i: Solid State Phenomena, ISSN 1012-0394, E-ISSN 1662-9779, Vol. 152-153, s. 377-380Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Y3Fe5O12 (YIG) films were pulsed laser deposited onto the Gd3Ga5O12(111) substrates. Processing conditions were optimized to obtain films with a narrow ferromagnetic resonance (FMR) linewidth: 0.9 Oe in 1.22 mu m thick YIG at 9 GHz. Due to sharp film-to-substrate interface YIG films remain strained hence possess unusually high lattice mismatch induced uniaxial anisotropy H-u = - 880 Oe. We fabricated and tested magnetostatic surface wave (MSSW) band pass hybrid-type filters with YIG film lain on transducers alumina board. MSSW filter with antennas areal size of 2 mm(2) at 7.5 GHz shows insertion loss - 9 dB and a resonant 3 dB bandwidth as narrow as 12.5 MHz.

sted, utgiver, år, opplag, sider
2009. Vol. 152-153, s. 377-380
Emneord [en]
yttrium iron garnet, epitaxial film, ferromagnetic resonance, uniaxial anisotropy, magnetostatic surface wave, S parameter, insertion loss, resonant bandwidth
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-30416DOI: 10.4028/www.scientific.net/SSP.152-153.377ISI: 000270899200091Scopus ID: 2-s2.0-76149092486OAI: oai:DiVA.org:kth-30416DiVA, id: diva2:400865
Merknad
QC 20110228 4th Moscow International Symposium on Magnetism, Moscow State Univ, Moscow, RUSSIA, JUN 20-25, 2008Tilgjengelig fra: 2011-02-28 Laget: 2011-02-24 Sist oppdatert: 2017-12-11bibliografisk kontrollert
Inngår i avhandling
1. Ferromagnetic resonance in films with growth induced anisotropy
Åpne denne publikasjonen i ny fane eller vindu >>Ferromagnetic resonance in films with growth induced anisotropy
2011 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This thesis discusses two different magnetic materials: epitaxial yttrium iron garnet (YIG) and heteromorphous CoFeB-SiO2 films.

YIG films were grown by pulse laser deposition (PLD) techniques onto gadolinium gallium garnet (GGG) substrates of (111) and (001) crystal orientations. Using stoichiometric and overstoichiometric ablative targets, we developed two types of YIG submicron films. The films grown from overstoichiometric targets have magnetic properties slightly different from standard liquid phase epitaxy (LPE) YIGs. They also demonstrate good substrate matching and approximately 6% nonstoichiometry. In contrary, films grown from stoichiometric targets posses surprisingly high values of uniaxial anisotropy, meanwhile cubic anisotropy is reduced several times. These films also reveal strong lattice distortions and nonstoichiometry around 17%.

Employing Weiss molecular field theory and single-ion anisotropy model we determined the preferential occupancy of the octahedral [a] positions in the YIG cubic lattices by Fe3+ vacancies. The vacancies were found to be preferentially oriented along the growth direction perpendicular to the film surface. We called this effect “deformation blockade”.

Different magnetostatic surface wave (MSSW) filters were also demonstrated. The filters employ high uniaxial anisotropy in YIG submicron films with magnetic losses ΔH ~ 1 Oe.

 Heteromorphous CoFeB-SiO2 films were deposited onto glass substrates employing carrousel magnetron sputtering. This novel technique allows amorphous films fabrication with record high in-plane anisotropy. The induced anisotropy fields here are approximately dozen times greater the values achieved using conventional growth technique when external bias field is applied during deposition process.

Interesting observations were made studying CoFeB-SiO2 magnetization dynamics in the wide frequency range from 500 kHz up to 15 GHz.  Two different anomalies of the magnetic susceptibility were found at the field of in-plane anisotropy Hp and critical field Hcr (0 < Hcr < Hp). We explained the anomalies appearance by sequence of the domain walls transformations so that Néel-Bloch-Néel domain wall transition stands for the instability at H = ±Hcr and transition from the uniformly magnetized state to the domain state with Néel domain wall and vice versa is responsible for the instability at H = ±Hp.

sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2011. s. xv, 114
Serie
Trita-ICT/MAP AVH, ISSN 1653-7610 ; 2011:16
Emneord
ferromagnetic resonance, magnetic anisotropy, single-ion anisotropy model, ferrites, magnetic epitaxial films, magnetostatic waves, pulsed laser deposition, magnetic alloys, domains, domain wall transformations
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-48248 (URN)978-91-7501-193-6 (ISBN)
Disputas
2011-12-14, Ka-C2, KTH-Electrum, Isafjordsgatan 26, Kista, 10:15 (engelsk)
Opponent
Veileder
Forskningsfinansiär
Swedish Research Council
Merknad
QC 20111122Tilgjengelig fra: 2011-11-22 Laget: 2011-11-16 Sist oppdatert: 2011-11-22bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekstScopus

Personposter BETA

Khartsev, Sergiy

Søk i DiVA

Av forfatter/redaktør
Manuilov, Sergey A.Fors, RickardKhartsev, SergiyGrishin, Alexander M.
Av organisasjonen
I samme tidsskrift
Solid State Phenomena

Søk utenfor DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 104 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf