Temperature dependence of magnetic resonance in ferrimagnetic GdFeCo alloys

被引：19

作者：

Okuno, Takaya ^{[1
]}

Kim, Se Kwon ^{[2
,3
]}

Moriyama, Takahiro ^{[1
]}

Kim, Duck-Ho ^{[1
]}

Mizuno, Hayato ^{[1
,4
]}

Ikebuchi, Tetsuya ^{[1
]}

Hirata, Yuushou ^{[1
]}

Yoshikawa, Hiroki ^{[5
]}

Tsukamoto, Arata ^{[5
]}

Kim, Kab-Jin ^{[6
]}

Shiota, Yoichi ^{[1
]}

Lee, Kyung-Jin ^{[7
,8
]}

Ono, Teruo ^{[1
,9
]}

机构：

[1] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan

[2] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[3] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

[4] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[5] Nihon Univ, Coll Sci & Technol, Funabashi, Chiba 2748501, Japan

[6] Korea Adv Inst Sci & Technol, Dept Phys, Daejeon 34141, South Korea

[7] Korea Univ, Dept Mat Sci & Engn, Seoul 02841, South Korea

[8] Korea Univ, KU KIST Grad Sch Converging Sci & Technol, Seoul 02841, South Korea

[9] Osaka Univ, Grad Sch Engn Sci, CSRN, Osaka 5608531, Japan

来源：

APPLIED PHYSICS EXPRESS | 2019年 / 12卷 / 09期

基金：

奥地利科学基金会; 日本学术振兴会; 新加坡国家研究基金会;

关键词：

GYROMAGNETIC RATIO;

D O I：

10.7567/1882-0786/ab33d5

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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

引用

页数：5

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