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arXiv · 1006.4133

Coherent magnetization precession in ferromagnetic (Ga,Mn)As induced by picosecond acoustic pulses

A. V. Scherbakov·A. S. Salasyuk·A. V. Akimov·X. Liu·M. Bombeck·C. Brüggemann·D. R. Yakovlev·V. F. Sapega·J. K. Furdyna·M. Bayer
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Abstract

We show that the magnetization of a thin ferromagnetic (Ga,Mn)As layer can be modulated by picosecond acoustic pulses. In this approach a picosecond strain pulse injected into the structure induces a tilt of the magnetization vector M, followed by the precession of M around its equilibrium orientation. This effect can be understood in terms of changes in magneto-crystalline anisotropy induced by the pulse. A model where only one anisotropy constant is affected by the strain pulse provides a good description of the observed time-dependent response.

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A. V. Scherbakov, A. S. Salasyuk, A. V. Akimov, X. Liu, M. Bombeck, C. Brüggemann, D. R. Yakovlev, V. F. Sapega, J. K. Furdyna, M. Bayer. 2010-06-21. Coherent magnetization precession in ferromagnetic (Ga,Mn)As induced by picosecond acoustic pulses. https://doi.org/10.1103/physrevlett.105.117204

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