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Structure and properties of deposited yttrium iron garnet films
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2005 (English)In: Physics of the solid state, ISSN 1063-7834, E-ISSN 1090-6460, Vol. 47, no 6, 1107-1110 p.Article in journal (Refereed) Published
Abstract [en]

Ferromagnetic resonance (FMR) and vibrating-sample magnetometer techniques were used to study the nature of the structural characteristics of yttrium iron garnet films deposited through either liquid phase epitaxy or laser evaporation on a (111)-oriented gallium gadolinium garnet substrate. It was proved that, based on the experimentally observed cubic magnetic anisotropy, deposited films should be considered to be single crystals. However, the absence of the FMR domain branch in a nonsaturated film and the shape of the magnetization curve indicate that a deposited film when demagnetized does not have a domain structure, as would be expected for a single-crystal film. According to the model proposed, a deposited film consists of close-packed single-crystal fragments with equal crystallographic orientation, the boundaries between which are in a partially atomically disordered state. As a result, such a film is both locally and macroscopically anisotropic, like a continuous single crystal. This film can split into domains only within a fragment (as is the case in a magnetic granular polycrystal); however, this does not happen, because the linear dimensions of a submicroscopic fragment are smaller than the equilibrium domain width.

Place, publisher, year, edition, pages
2005. Vol. 47, no 6, 1107-1110 p.
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URN: urn:nbn:se:kth:diva-14839ISI: 000229860600018Scopus ID: 2-s2.0-20844434142OAI: oai:DiVA.org:kth-14839DiVA: diva2:332880
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Khartsev, Sergiy

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