Controlling the Suhl instability: a numerical study
Materials Science
2007-05-23 v1
Abstract
Magnetization reversal (switching) using either r.f. fields or brute-force precessional switching is currently thought to ultimately be limited by the non-linear excitation of non-uniform spin waves, the so-called Suhl instability. Here we show (numerically, for the case of a sphere) that this instability can be suppressed by choosing the applied field and/or sphere diameter in such a way that the frequencies of the modes that can be excited through non-linear processes are off-resonance. While the results cannot be explained by a traditional model based on plane waves, they can be understood by projecting the actual state onto the small amplitude spin resonant eigenfunctions.
Keywords
Cite
@article{arxiv.cond-mat/0511496,
title = {Controlling the Suhl instability: a numerical study},
author = {K. Rivkin and V. Chandrasekhar and J. B. Ketterson},
journal= {arXiv preprint arXiv:cond-mat/0511496},
year = {2007}
}