Nonequilibrium Magnetisation Reversal by Periodic Impulsive Field in Ising Meanfield Dynamics

TL;DR

This paper investigates how periodic impulsive magnetic fields can reverse magnetization in meanfield Ising models, analyzing the effects of field strength and periodicity through differential equations and simulations.

Contribution

It introduces a meanfield approach to study nonequilibrium magnetization reversal driven by periodic impulsive fields, including analytical and simulation comparisons.

Findings

Minimum impulsive field strength for reversal depends on temperature and periodicity.

Reversal threshold is linear at high temperature and small period.

Results are consistent with Monte Carlo simulations of 3D Ising ferromagnets.

Abstract

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