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- W2005078466 abstract "We report comprehensive temperature and photoexcitation intensity dependent studies of the photoinducedmagnetization precession in Ga 1-x Mn x As ( x = 0.035) by time-resolved Kerr rotation measurements. We observe coherentoscillations of local Mn spins triggered by an ultrafast photo-induced reorientation of the easy axis due to changes in themagnetic anisotropy. The amplitude saturation of these oscillations above certain pump intensity is indicative ofstabilization of the magnetic easy axis orientation on temperatures above ~Tc/2. We find that the observed magnetizationprecession damping (Gilbert damping) is strongly dependent on pump laser intensity, but largely independent of ambienttemperature." @default.
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- W2005078466 date "2007-11-29" @default.
- W2005078466 modified "2023-09-23" @default.
- W2005078466 title "Control of coherent magnetization precession in GaMnAs by ultrafast optical excitation" @default.
- W2005078466 doi "https://doi.org/10.1117/12.755487" @default.
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