Nonequilibrium phase transition in the kinetic Ising model driven by propagating magnetic field wave

TL;DR

This paper investigates a two-dimensional kinetic Ising model under a propagating magnetic field wave, revealing a nonequilibrium phase transition influenced by the wave's speed, with detailed analysis of order parameters and critical behavior.

Contribution

It introduces the study of a propagating magnetic field wave in the kinetic Ising model, extending prior work on uniform fields and analyzing the effects on phase transition characteristics.

Findings

Dynamic phase transition observed with propagating magnetic field.

Sharp maxima in specific heat and mean square deviation near transition.

Transition temperature depends on the wave's propagation speed.

Abstract

The two dimensional ferromagnetic Ising model in the presence of a propagating magnetic field wave (with well defined frequency and wavelength) is studied by Mone Carlo simulation. This study differs from all of the earlier studies done so far, where the oscillating magnetic field was considered to be uniform in space. The time average magnetisation over a full cycle (the time period) of the propagating magnetic field acts as the dynamic order parameter. The dynamical phase transition is observed. The temperature variation of the dynamic order parameter, the mean square deviation of the dynamic order parameter, the dynamic specific heat and the derivative of the dynamic order parameter are studied. The mean square deviation of the dynamic order parameter, dynamic specific heat show sharp maxima near the transition point. The derivative of dynamic order parameter shows sharp minimum near the transition point. The transition temperature is found to depend also on the speed of propagation of the magnetic field wave.