Investigation of an effective anisotropy field involved in photoinduced precession of magnetization in (Ga,Mn)As

被引：8
|
作者：
Kobayashi, S. [1 ]
Hashimoto, Y. [1 ]
Munekata, H. [1 ]
机构：
[1] Tokyo Inst Technol, Imaging Sci & Engn Lab, Midori Ku, Yokohama, Kanagawa 2268502, Japan
来源：
JOURNAL OF APPLIED PHYSICS | 2009年 / 105卷 / 07期
关键词：
FILMS;
D O I：
10.1063/1.3073848
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Photoinduced precession of magnetization in (Ga,Mn)As was studied for a wide range of Mn contents (0.01 <= x <= 0.11) by time-resolved magneto-optical measurements. It was found that an effective anisotropy field decreases with increasing Mn contents. Anisotropy fields were also extracted from photoinduced precession measured at different temperatures and compared with magnetization. Significant enhancement in the amplitude of oscillation in magneto-optical signals occurred with increasing pump power. The mechanism of a change in the anisotropy field with the pump power was discussed. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3073848]
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页数：3
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