2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/125819The 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.The 10th Joint MMM/Intermag, HA-09Materials ScienceMesoscale and Nanoscale Physicstext