Current induced transverse spin-wave instability in thin ferromagnets: beyond linear stability analysis
Mesoscale and Nanoscale Physics
2009-11-11 v1 Materials Science
Abstract
A sufficiently large unpolarized current can cause a spin-wave instability in thin nanomagnets with asymmetric contacts. The dynamics beyond the instability is understood in the perturbative regime of small spin-wave amplitudes, as well as by numerically solving a discretized model. In the absence of an applied magnetic field, our numerical simulations reveal a hierarchy of instabilities, leading to chaotic magnetization dynamics for the largest current densities we consider.
Cite
@article{arxiv.cond-mat/0508732,
title = {Current induced transverse spin-wave instability in thin ferromagnets: beyond linear stability analysis},
author = {Shaffique Adam and Mikhail L. Polianski and Piet W. Brouwer},
journal= {arXiv preprint arXiv:cond-mat/0508732},
year = {2009}
}
Comments
14 pages, 10 figures; revtex4