Micromagnetic simulations of the magnetization precession induced by a spin-polarized current in a point-contact geometry (Invited)

This paper is devoted to numerical simulations of the magnetization dynamics driven by a spin-polarized current in extended ferromagnetic multilayers when a point-contact setup is used. We present (i) detailed analysis of methodological problems arising by such simulations and (ii) physical results obtained on a system similar to that studied in Rippard [Phys. Rev. Lett. 92, 027201 (2004)]. We demonstrate that the usage of a standard Slonczewski formalism for the phenomenological treatment of a spin-induced torque leads to a qualitative disagreement between simulation results and experimental observations, and discuss possible reasons for this discrepancy. (C) 2006 American Institute of Physics.