Dynamic Phase Diagrams of a Mixed Spin-1 and Spin-5/2 Ising System in an Oscillating Magnetic Field

KESKİN M., Canko O., Bati M.

JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol.55, no.4, pp.1344-1356, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 55 Issue: 4
  • Publication Date: 2009
  • Doi Number: 10.3938/jkps.55.1344
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1344-1356
  • Keywords: Mixed spin-1 and spin-5/2 Ising ferrimagnetic model, Glauber-type stochastic dynamics, Dynamic phase transition, Phase diagrams, EMERY-GRIFFITHS MODEL, CRITICAL-BEHAVIOR, REENTRANT TRANSITIONS, KINETICS, POINTS
  • Recep Tayyip Erdoğan University Affiliated: No


We study the nonequilibrium aspects of the kinetics of a mixed spin-1 and spin-5/2 Ising system, including the biquadratic nearest-neighbor pair interaction (K) and the crystal-field interaction (D), tinder the presence of a time-dependent oscillating external magnetic field within a mean-field approach. The set of mean-field dynamic equations is obtained by employing the Glauber transition rates. We investigate the time variations of the average order parameters to find the phases in the system. We also study the thermal behavior of the dynamic order parameters to characterize the nature (continuous or discontinuous) of the phase transitions and to obtain the dynamic phase transition (DPT) points. The dynamic phase diagrams are presented in three different planes. The phase diagrams are discussed, and a comparison is made with the results of other kinetic mixed spin Ising systems.