Effective field theory study of bond dilution effects on transverse Ising antiferromagnet in a random longitudinal magnetic field


Kple J., Hontinfinde F., ALBAYRAK E.

Chinese Journal of Physics, vol.83, pp.467-479, 2023 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 83
  • Publication Date: 2023
  • Doi Number: 10.1016/j.cjph.2023.04.005
  • Journal Name: Chinese Journal of Physics
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, INSPEC, zbMATH
  • Page Numbers: pp.467-479
  • Keywords: Ising antiferromagnet, Effective field theory, Transverse magnetic field, Phase transitions, Compensation point
  • Erciyes University Affiliated: Yes

Abstract

The transverse antiferromagnetic spin-[Formula presented] Ising model is studied within the effective field theory with correlations for a finite cluster with random bond dilution and random longitudinal magnetic field effects. The bonds are either randomly antiferromagnetically switched on with probability p or switched off with 1−p. In addition, the external magnetic field is randomly turned up or down in the longitudinal direction with probability t and 1−t, respectively. The thermal variations of the longitudinal and transverse sublattice magnetizations, as well as the staggered longitudinal magnetizations with coordination numbers q=4 and 6, are studied to obtain the phase diagrams of the model. It is found that the model exhibits both first- and second-order phase transitions. Compensation temperatures and reentrant behaviors are also shown for appropriate values of the system parameters.