Recent experiments demonstrated generation of spin currents by ultrasound. We can understand this acoustically induced spin pumping in terms of the coupling between magnetization and lattice waves. Here we study the parametric excitation of magnetization by longitudinal acoustic waves and calculate the acoustic threshold power. The induced magnetization dynamics can be detected by the spin pumping into an adjacent normal metal that displays the inverse spin Hall effect.
@article{arxiv.1312.6499,
title = {Acoustic parametric pumping of spin waves},
author = {Hedyeh Keshtgar and Malek Zareyan and Gerrit E. W. Bauer},
journal= {arXiv preprint arXiv:1312.6499},
year = {2015}
}
Comments
6 pages, 2 figures, Accepted for publication in SSC