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

Aktas B. O., Vatansever E., Polat H.

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, vol.447, pp.379-385, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 447
  • Publication Date: 2016
  • Doi Number: 10.1016/j.physa.2015.12.009
  • Journal Name: PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.379-385
  • Keywords: Monte Carlo simulations, Magnetic thin-film, Surface magnetism, Surface enhancement phenomenon, SPIN-1/2 ISING FILM, LAYERING TRANSITIONS, CRITICAL-BEHAVIOR, HEISENBERG-MODEL, SURFACE, FIELD, MAGNETIZATION, MAGNETISM
  • Dokuz Eylül University Affiliated: Yes

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 reduced exchange interaction (surface to bulk ratio values in R < R-c and R > R-c regimes where R-c is the critical value at which the critical temperature becomes independent of film thickness L) have also been taken into consideration. The average magnetizations with varying temperature of each layer are reversed in these two regimes. Based on the results, we have confirmed that the system represents a crossover behavior between ordinary and extraordinary transition in the presence of surface exchange enhancement. (C) 2015 Elsevier B.V. All rights reserved.