Abstract:
A nonlinear resonance excited by an alternating spin-polarized current in a ferromagnetic nanocylinder whose magnetization comprises a magnetic vortex is studied theoretically. The results obtained on the basis of the dynamic Thiele equation for the motion of the vortex core are compared with the micromagnetic simulation. Conditions for a shift of the resonant frequency and the appearance of hysteresis are studied at a sufficiently large amplitude of the spin-polarized current.