Switching speed distribution of spin-torque-induced magnetic reversal

Details Switching speed distribution of spin-torque-induced magnetic reversal Switching speed distribution of spin-torque-induced magnetic reversal

2006-12-13

arxiv.org/abs/cond-mat/0612334v1

J. Appl. Phys. 101, 09A501 (2007)

Physics

Condensed Matter

Materials Science

The 10th Joint MMM/Intermag, HA-09

Scientific paper

10.1063/1.2668365

The switching probability of a single-domain ferromagnet under spin-current excitation is evaluated using the Fokker-Planck equation(FPE). In the case of uniaxial anisotropy, the FPE reduces to an ordinary differential equation in which the lowest eigenvalue $\lambda_1$ determines the slowest switching events. We have calculated $\lambda_1$ by using both analytical and numerical methods. It is found that the previous model based on thermally distributed initial magnetization states \cite{Sun1} can be accurately justified in some useful limiting conditions.

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