We present experimental data obtained from ferromagnetic p-(Ga,Mn) As layers that indicate the collective rotation of ferromagnetically coupled Mn spins by optically generated spin-polarized holes through the p-d exchange interaction. The rotation occurs reversibly between the in-plane and perpendicular directions, causing a large change in perpendicular magnetization without the application of a magnetic field. Pump-and-probe experiments suggest that the rotation of Mn spins take place in the picosecond time domain.
|ジャーナル||Journal of Superconductivity and Novel Magnetism|
|出版ステータス||Published - 2003|
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