Selective spin wave excitation in ferromagnetic (Ga,Mn)As layers by picosecond strain pulses

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

doi:10.1103/PhysRevB.85.195324

Selective spin wave excitation in ferromagnetic (Ga,Mn)As layers by picosecond strain pulses

Materials Science 2013-01-11 v1 Other Condensed Matter

Authors: M. Bombeck , A. S. Salasyuk , B. A. Glavin , A. V. Scherbakov , C. Brüggemann , D. R. Yakovlev , V. F. Sapega , X. Liu , J. K. Furdyna , A. V. Akimov , M. Bayer

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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.

Keywords

spin wave excitation ferromagnetic (Ga,Mn)As picosecond strain pulses magnon-phonon interaction selection rule magnetization precession spatial matching

Cite

@article{arxiv.1112.3394,
  title  = {Selective spin wave excitation in ferromagnetic (Ga,Mn)As layers by picosecond strain pulses},
  author = {M. Bombeck and A. S. Salasyuk and B. A. Glavin and A. V. Scherbakov and C. Brüggemann and D. R. Yakovlev and V. F. Sapega and X. Liu and J. K. Furdyna and A. V. Akimov and M. Bayer},
  journal= {arXiv preprint arXiv:1112.3394},
  year   = {2013}
}

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16 pages, 3 figures, submitted to PRL

Selective spin wave excitation in ferromagnetic (Ga,Mn)As layers by picosecond strain pulses

Abstract

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