Spin-Reversal Transition in Ising Model under Pulsed Field

TL;DR

This paper investigates a dynamic spin-reversal transition in a 2D Ising model triggered by pulsed magnetic fields, using Monte Carlo simulations and mean field analysis, revealing how pulse parameters induce phase changes.

Contribution

It demonstrates the existence of a dynamic spin-reversal transition controlled by pulse strength and duration in the kinetic Ising model, combining Monte Carlo and mean field approaches.

Findings

Transition depends on pulse strength and duration

System switches between ordered phases via domain growth

Transition is dynamic and field-induced

Abstract

In this communication we report the existence of a dynamic ``spin-reversal'' transition in an Ising system perturbed by a pulsed external magnetic field. The transition is achieved by tuning the strength ($h_p$) and/or the duration ($\Delta t$) of the pulse which is applied in a direction opposite to the existing order. We have studied this transition in the kinetic Ising Model in two dimension using Monte Carlo technique, and solved numerically the mean field equation of motion. The transition is essentially dynamic in nature and it takes the system from one ordered equilibrium phase to another by means of the growth of opposite spin domains (in the kinetic Ising case) induced during the period when the pulsed field is applied.