Dynamics of photoinduced magnetization rotation in ferromagnetic semiconductor p-(Ga,Mn)As -: art. no. 033203

被引：65
|
作者：
Mitsumori, Y
Oiwa, A
Slupinski, T
Maruki, H
Kashimura, Y
Minami, F
Munekata, H
机构：
[1] Tokyo Inst Technol, Imaging Sci & Engn Lab, Yokohama, Kanagawa 2268503, Japan
[2] Japan Sci & Technol Corp, PRESTO, Kawaguchi 3320012, Japan
[3] Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland
[4] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan
来源：
PHYSICAL REVIEW B | 2004年 / 69卷 / 03期
关键词：
D O I：
10.1103/PhysRevB.69.033203
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Dynamics of photoinduced magnetization rotation was studied in ferromagnetic p-(Ga,Mn)As by carefully comparing the temporal profile of the photoinduced polar Kerr rotation with that of the photoinduced reflectivity change. Rotation of ferromagnetically coupled Mn spins is induced by photogenerated hole spins within the excitation pulse width of a 100 fs, whereas relaxation takes place in tens of picosecond as a result of strong damping. Observed results suggest that hole and Mn spins rotate and relax together upon optical excitation. This would be a different type of excitation (coupled hole-Mn spin complex) appearing in the hole-mediated ferromagnetic system.
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页数：4
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