Mixed-Spin Ising Model in an Oscillating Magnetic Field and Compensation Temperature

KESKİN M. , ERTAŞ M.

JOURNAL OF STATISTICAL PHYSICS, vol.139, no.2, pp.333-344, 2010 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 139 Issue: 2
  • Publication Date: 2010
  • Doi Number: 10.1007/s10955-010-9943-6
  • Title of Journal : JOURNAL OF STATISTICAL PHYSICS
  • Page Numbers: pp.333-344
  • Keywords: Mixed-spin Ising system, Dynamic phase transitions, Dynamic compensation temperature, Dynamic phase diagrams, Glauber-type stochastic dynamics, FERRIMAGNETIC TERNARY ALLOY, SINGLE-ION-ANISOTROPY, BETHE LATTICE, CRYSTAL-FIELD, SYSTEM

Abstract

Godoy et al. (Phys. Rev. B 69, 054428, 2004) presented a study of the magnetic properties of a mixed spin (1/2,1), Ising ferrimagnetic model on a hexagonal lattice without an oscillating magnetic field. They employed dynamic mean-field calculations and Monte Carlo simulations to find the compensation point of the model and to present the phase diagrams. It has been found that the N-type compensation temperature appears only when the intrasublattice interaction between spins in the sigma sublattice is ferromagnetic. Moreover, the system only undergoes a second-order phase transition. In this work, we extend the study a dynamic compensation temperature of a mixed spin-1/2 and spin-1 Ising ferrimagnetic system on a hexagonal lattice in the presence of oscillating magnetic field within the framework of dynamic mean-field calculations. We find that the system displays the N-type compensation temperature. We also calculate dynamic phase diagrams in which contain the paramagnetic, ferrimagnetic, nonmagnetic fundamental phases and two different mixed phases, depending on the interaction parameters and oscillating magnetic field. The system also exhibits tricritical and reentrant behaviors.