Photoinduced precession of magnetization in ferromagnetic (Ga,Mn)As

Y. Hashimoto, S. Kobayashi, H. Munekata

Research output: Contribution to journalArticlepeer-review

98 Citations (Scopus)


Precession of magnetization induced by pulsed optical excitation is observed in a ferromagnetic semiconductor (Ga,Mn)As by time-resolved magneto-optical measurements. It appears as complicated oscillations of a polarization plane of linearly polarized probe pulses, but is reproduced by gyromagnetic theory incorporating an impulsive change in an effective magnetic field due to a change in the magnetic anisotropy. The shape of the impulse suggests a significant nonthermal contribution of photogenerated carriers to the change in anisotropy through spin-orbit interaction.

Original languageEnglish
Article number067202
JournalPhysical review letters
Issue number6
Publication statusPublished - 2008 Feb 13
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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