Magnetization Dynamics of a Single-domain Magnet Under a Spin-polarized Current with a Tilted Polarization

Abstract

Magnetization dynamics for a single-domain magnet under a spin-polarized current with a tilted polarization was investigated by solving the Landau-Lifshitz-Gilbert-Slonczewski equation. Taking into consideration the uniaxial magnetic anisotropy, the stationary-state solutions of the magnetization vector could be analytically obtained by solving an algebraic cubic equation. It was found that one to three pairs of magnetic stationary-states existed, depending on the applied current density and the spin-polarized direction. The critical switching current and reversal time for magnetization switching were numerically found under different tilted polarization configurations with considering different forms of the spin-polarized function. The results may be useful for the design of the future spintronic devices.