Photoinduced Magnetization Rotation and Precessional Motion of Magnetization in Ferromagnetic (Ga,Mn)As |
| |
| Authors: | A. Oiwa H. Takechi H. Munekata |
| |
| Affiliation: | (1) PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi 332-0012, Japan;(2) Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama 226-8502, Japan |
| |
| Abstract: | Dynamics of photoinduced magnetization have been studied in ferromagnetic semiconductor (Ga,Mn)As thin films by time-resolved polar Kerr rotation. Ultrafast ( 150 fs) magnetization rotation has been realized using both chirality of excitation light and p–d exchange interaction. We also report on the occurrence of photoinduced magnetization precession in longer time domain. This is initiated by a change in hole concentration and resultant change in magnetic anisotropy. The overall behaviors of these photoinduced magnetization dynamics are discussed. |
| |
| Keywords: | III– V-based magnetic semiconductors photoinduced magnetization rotation magnetization precession magnetic anisotropy |
| 本文献已被 SpringerLink 等数据库收录！ |
|
