Fig. 4: Stability diagram, bistability and probabilistic distribution for nearly isotropic magnets.
From: Dynamical stability by spin transfer in nearly isotropic magnets
a, Bifurcation diagram constructed from the stationary solutions of the LLG equation. b, ST-FMR for different Idc close to the damping compensation condition. When a larger Idc increases the anti-damping torques beyond the critical value, the magnetization precesses around the dynamically stable state at the north pole, generating an opposite d.c. voltage at resonance. c, The ST-FMR results highlight the current-induced magnetization reversal. The inset shows the FMR frequencies as functions of field for the two magnetization directions. d–f, Time-dependent traces of the normalized My component for small (d)/medium (e)/large (f) anti-damping torques. Here, My = −1 is along the magnetic field direction.
