Photo-induced precession of magnetization in ferromagnetic (Ga,Mn)As

Abstract

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 polarization plane of linearly-polarized probe pulses, but is reproduced by gyromagnetic theory incorporating an impulsive change in an effective magnetic field due to changes in magnetic anisotropy. It is inferred from the shape of the impulse that the changes in anisotropy result from non-equilibrium carrier population: cooling of hot photo-carriers and subsequent annihilation of photo-carriers.

References in corpus (1)

• Light-Induced Magnetic Precession in (Ga,Mn)As Slabs: Hybrid Standing-Wave Damon-Eshbach Modes

Cited by in corpus (12)

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• Coherent manipulation of magnetization precession in ferromagnetic semiconductor (Ga,Mn)As with successive optical pumping
• Effect of magnetic anisotropy relaxation on laser-induced magnetization precession in thin galfenol films
• Ultrafast spin dynamics in II-VI diluted magnetic semiconductors with spin-orbit interaction
• Optically excited spin dynamics of thermally metastable skyrmions in Fe${}_{0.75}$Co${}_{0.25}$Si
• Laser-induced Precession of Magnetization in GaMnAs
• Collective magnetization dynamics in ferromagnetic (Ga,Mn)As mediated by photo-excited carriers
• 4D visualization of the photoexcited coherent magnon by an X-ray free electron laser
• Investigation of Optical Spin Transfer Torque in Ferromagnetic Semiconductor GaMnAs by Magneto-Optical Pump-and-Probe Method