Switching speed distribution of spin-torque-induced magnetic reversal

Abstract

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.

The 10th Joint MMM/Intermag, HA-09

References in corpus (1)

• Spin-torque switching: Fokker-Planck rate calculation

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