1. Selective spin wave excitation in ferromagnetic (Ga,Mn)As layers by picosecond strain pulses
- Author
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Bombeck, M., Salasyuk, A. S., Glavin, B. A., Scherbakov, A. V., Brüggemann, C., Yakovlev, D. R., Sapega, V. F., Liu, X., Furdyna, J. K., Akimov, A. V., and Bayer, M.
- Subjects
Condensed Matter - Other Condensed Matter ,Condensed Matter - Materials Science ,Condensed Matter::Materials Science ,Materials Science (cond-mat.mtrl-sci) ,FOS: Physical sciences ,Condensed Matter::Strongly Correlated Electrons ,Other Condensed Matter (cond-mat.other) - Abstract
We demonstrate selective excitation of a spin wave mode in a ferromagnetic (Ga,Mn)As film by picosecond strain pulses. For a certain range of magnetic fields applied in the layer plane only a single frequency is detected for the magnetization precession. We explain this selectivity of spin mode excitation by the necessity of spatial matching of magnon and phonon eigenfunctions, which represents a selection rule analogous to momentum conservation for magnon-phonon interaction in bulk ferromagnetic materials., Comment: 16 pages, 3 figures, submitted to PRL
- Published
- 2011
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