Gilbert and Landau-Lifshitz damping in the presense of spin-torque

Details Gilbert and Landau-Lifshitz damping in the presense of spin-torque Gilbert and Landau-Lifshitz damping in the presense of spin-torque

2007-06-12

arxiv.org/abs/0706.1736v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, no figures. Not presently intended for journal publication

Scientific paper

A recent article by Stiles et al. (cond-mat/0702020) argued in favor of the Landau-Lifshitz damping term in the micromagnetic equations of motion over that of the more commonly accepted Gilbert damping form. Much of their argument revolved around spin-torque driven domain wall motion in narrow magnetic wires, since the presence of spin-torques can more acutely draw a distinction between the two forms of damping. In this article, the author uses simple arguments and examples to offer an alternative point of view favoring Gilbert.

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