Nonequilibrium magnetization reversal by periodic impulsive fields in Ising mean-field dynamics

Abstract

We studied nonequilibrium magnetization reversal in kinetic Ising ferromagnets driven by a periodic impulsive magnetic field in the mean-field approximation. The mean-field differential equation was solved by the sixth-order Runge–Kutta–Felberg method. The periodicity and strength of the applied impulsive magnetic field play a key role in magnetization reversal. We studied the minimum strength of an impulsive field required for magnetization reversal at any temperature as a function of the periodicity of the impulsive field. At high temperature and small period, this was observed to be linear. The results were compared with those obtained from the Monte Carlo simulation of a three-dimensional Ising ferromagnet.