Monte Carlo simulations of dynamic phase transitions in ferromagnetic thin-films

TL;DR

This paper uses Monte Carlo simulations to study dynamic phase transitions in ferromagnetic thin-films, analyzing how surface and bulk properties change with temperature and film thickness, revealing crossover behaviors related to surface exchange effects.

Contribution

It provides detailed Monte Carlo analysis of dynamic phase transitions in ferromagnetic thin-films, highlighting surface effects and crossover behaviors not extensively explored before.

Findings

Identification of critical surface to bulk exchange interaction ratio $R_c$

Confirmation of crossover from ordinary to extraordinary transition

Layer magnetization reversal in certain regimes

Abstract

By means of detailed Monte Carlo (MC) simulations, we have presented dynamic phase transition (DPT) properties of ferromagnetic thin-films. Thermal variations of surface, bulk and total dynamical order parameters (DOP) for a film and total order parameter for the films with different thicknesses have been examined. Opposite regimes of the critical value of reduced exchange interaction (surface to bulk ratio) $R_{c}$ at which the critical temperature becomes independent of film thickness $L$ has been also taken into consideration. The average magnetizations of each layer is reversed in these regimes. Based on the results, we have confirmed that the system represents a crossover behavior in between ordinary to extraordinary transition in the presence of surface exchange enhancement.