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Switching speed distribution of spin-torque-induced magnetic reversal

J. He·J. Z. Sun·S. Zhang
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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 $λ_1$ determines the slowest switching events. We have calculated $λ_1$ 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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J. He, J. Z. Sun, S. Zhang. 2006-12-13. Switching speed distribution of spin-torque-induced magnetic reversal. https://doi.org/10.1063/1.2668365

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