Spin-wave instabilities in spin-transfer-driven magnetization dynamics
Mesoscale and Nanoscale Physics
2010-01-28 v1 Other Condensed Matter
Abstract
We study the stability of magnetization precessions induced in spin-transfer devices by the injection of spin-polarized electric currents. Instability conditions are derived by introducing a generalized, far-from-equilibrium interpretation of spin-waves. It is shown that instabilities are generated by distinct groups of magnetostatically coupled spin-waves. Stability diagrams are constructed as a function of external magnetic field and injected spin-polarized current. These diagrams show that applying larger fields and currents has a stabilizing effect on magnetization precessions. Analytical results are compared with numerical simulations of spin-transfer-driven magnetization dynamics.
Cite
@article{arxiv.1001.4806,
title = {Spin-wave instabilities in spin-transfer-driven magnetization dynamics},
author = {G. Bertotti and R. Bonin and M. d'Aquino and C. Serpico and I. D. Mayergoyz},
journal= {arXiv preprint arXiv:1001.4806},
year = {2010}
}
Comments
4 pages, 2 figures