Dynamic hysteresis behaviors for the two-dimensional mixed spin (2,5/2) ferrimagnetic Ising model in an oscillating magnetic field


Ertas M.

SUPERLATTICES AND MICROSTRUCTURES, vol.85, pp.734-742, 2015 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 85
  • Publication Date: 2015
  • Doi Number: 10.1016/j.spmi.2015.07.006
  • Title of Journal : SUPERLATTICES AND MICROSTRUCTURES
  • Page Numbers: pp.734-742
  • Keywords: Mixed spin (2,5/2) ferrimagnetic Ising model, Dynamic mean-field theory, Dynamic hysteresis behavior, Dynamic phase diagrams, EMERY-GRIFFITHS MODEL, NONEQUILIBRIUM PHASE-TRANSITION, BLUME-CAPEL MODEL, BILAYER SYSTEM, DIAGRAMS, TEMPERATURE

Abstract

Keskin and Ertas (2009) presented a study of the magnetic properties of a mixed spin (2, 5/2) ferrimagnetic Ising model within an oscillating magnetic field. They employed dynamic mean-field calculations to find the dynamic phase transition temperatures, the dynamic compensation points of the model and to present the dynamic phase diagrams. In this work, we extend the study and investigate the dynamic hysteresis behaviors for the two-dimensional (2D) mixed spin (2,5/2) ferrimagnetic Ising model on a hexagonal lattice in an oscillating magnetic field within the framework of dynamic mean-field calculations. The dynamic hysteresis curves are obtained for both the ferromagnetic and antiferromagnetic interactions and the effects of the Hamiltonian parameters on the dynamic hysteresis behaviors are discussed in detail. The thermal behaviors of the coercivity and remanent magnetizations are also investigated. The results are compared with some theoretical and experimental works and a qualitatively good agreement is found. Finally, the dynamic phase diagrams depending on the frequency of an oscillating magnetic field in the plane of the reduced temperature versus magnetic field amplitude is examined and it is found that the dynamic phase diagrams display richer dynamic critical behavior for higher values of frequency than for lower values. (C) 2015 Elsevier Ltd. All rights reserved.