Dynamics of the polarization of a pinned domain wall in a magnetic nanowire

Abstract

We consider the dynamics of polarization of a single domain wall in a magnetic nanowire, which is strongly pinned by impurities. In this case the equation of motion for the polarization parameter does not include any other dynamical variables and is nonlinear due to magnetic anisotropy. We calculated numerically the magnetization dynamics for different choices of parameters under short current pulses inducing polarization switching. Our results show that the switching is most effective for very rapid current pulses. Damping also enhances the switching probability.

Manipulating the magnetization direction of transverse domain walls in Permalloy/Ir strips using nanosecond current pulses

“…Current-induced switching of the TW magnetization not related to Oersted fields has been reported in literature [23,24,25]. In order to ascertain that the TW magnetization is imposed by the Oersted field, we applied current pulses giving rise to fields parallel to the TW magnetization.…”