Effective field theory study of bond dilution effects on transverse Ising antiferromagnet in a random longitudinal magnetic field
Chinese Journal of Physics, cilt.83, ss.467-479, 2023 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 83
- Basım Tarihi: 2023
- Doi Numarası: 10.1016/j.cjph.2023.04.005
- Dergi Adı: Chinese Journal of Physics
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, INSPEC, zbMATH
- Sayfa Sayıları: ss.467-479
- Anahtar Kelimeler: Ising antiferromagnet, Effective field theory, Transverse magnetic field, Phase transitions, Compensation point
- Erciyes Üniversitesi Adresli: Evet
Özet
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.