Temperature dependence of magnetic resonance in ferrimagnetic GdFeCo alloys

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We provide a macroscopic theory and experimental results for magnetic resonances of antiferromagnetically-coupled ferrimagnets. Our theory, which interpolates the dynamics of antiferromagnets and ferromagnets smoothly, can describe ferrimagnetic resonances across the angular momentum compensation point. We also present experimental results for spin-torque induced ferrimagnetic resonance at several temperatures. The spectral analysis based on our theory reveals that the Gilbert damping parameter, which has been considered to be strongly temperature dependent, is insensitive to temperature. We envision that our work will facilitate further investigation of ferrimagnetic dynamics by providing a theoretical framework suitable for a broad range of temperatures. (C) 2019 The Japan Society of Applied Physics
Publisher
IOP PUBLISHING LTD
Issue Date
2019-09
Language
English
Article Type
Article
Citation

APPLIED PHYSICS EXPRESS, v.12, no.9

ISSN
1882-0778
DOI
10.7567/1882-0786/ab33d5
URI
http://hdl.handle.net/10203/264327
Appears in Collection
PH-Journal Papers(저널논문)
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