Ferromagnetic resonance study of magnetization relaxation in GaMnAs

被引：8
|
作者：
Matsuda, YH [1 ]
Oiwa, A
Tanaka, K
Munekata, H
机构：
[1] Okayama Univ, Fac Sci, Dept Phys, Okayama 7008530, Japan
[2] Japan Sci & Technol Agcy, PRESTO, Kawaguchi 3320012, Japan
[3] Tokyo Inst Technol, Imaging Sci & Engn Lab, Yokohama, Kanagawa 2268502, Japan
来源：
PHYSICA B-CONDENSED MATTER | 2006年 / 376卷
关键词：
GaMnAs; ferromagnetic resonance; Gilbert dumping factor;
D O I：
10.1016/j.physb.2005.12.168
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We have studied magnetic relaxation in a Ga0.97Mn0.03As thin film using ferromagnetic resonance (FMR) at two different microwave frequencies (9.47 and 34GHz). The intrinsic FMR line width described by the Gilbert damping parameter a, being the resistance against the inertia motion, and the inhomogeneous broadening Delta H-pp(0) due to the variation of the magnetic properties in the sample were evaluated by the frequency dependence of the FMR line width Delta H-pp(omega). It was found that the inhomogeneous broadening is significant at 10 K and tends to decrease as temperature increases. On the other hand, a (0.02-0.04 at 10 K) was found to increase with temperature. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：668 / 671
页数：4
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