Dynamic phase transitions and dynamic phase diagrams of the spin-2 Blume-Capel model under an oscillating magnetic field within the effective-field theory

ERTAŞ M., Deviren B., KESKİN M.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, cilt.324, sa.5, ss.704-710, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 324 Sayı: 5
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.jmmm.2011.08.057
  • Dergi Adı: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.704-710
  • Anahtar Kelimeler: Spin-2 Blume-Capel model, Effective-field theory, Glauber-type stochastic dynamics, Dynamic phase transition, Oscillating magnetic field, HEISENBERG FERRIMAGNETIC SYSTEM, TRANSVERSE ISING-MODEL, EMERY-GRIFFITHS MODEL, MIXED SPIN-2, MONTE-CARLO, AMORPHIZATION, TEMPERATURE, BEHAVIOR
  • Erciyes Üniversitesi Adresli: Evet

Özet

The dynamic phase transitions are studied in the kinetic spin-2 Blume-Capel model under a time-dependent oscillating magnetic field using the effective-field theory with correlations. The effective-field dynamic equation for the average magnetization is derived by employing the Glauber transition rates and the phases in the system are obtained by solving this dynamic equation. The nature (first- or second-order) of the dynamic phase transition is characterized by investigating the thermal behavior of the dynamic magnetization and the dynamic phase transition temperatures are obtained. The dynamic phase diagrams are constructed in the reduced temperature and magnetic field amplitude plane and are of seven fundamental types. Phase diagrams contain the paramagnetic (P), ferromagnetic-2 (F-2) and three coexistence or mixed phase regions, namely the F-2+P, F-1+P and F-2+F-1 +P, which strongly depend on the crystal-field interaction (D) parameter. The system also exhibits the dynamic tricritical behavior. (C) 2011 Elsevier B.V. All rights reserved.