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Mixed spin-2 and spin-52 Blume–Emery–Griffiths model

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  • Albayrak, E.

Abstract

The mixed spin-2 and spin-52 Blume–Emery–Griffiths (BEG) Ising ferrimagnetic system is studied on the Bethe lattice using the exact recursion equations with the coordination number q=3 corresponding to the honeycomb lattice on real lattices. The influences of the crystal field and the biquadratic interactions are investigated by obtaining the phase diagrams on the (K/|J|,kT/|J|) and (D/|J|,kT/|J|) planes, respectively, with equal crystal field interactions for the sublattices. The model presents very rich critical behaviors, which includes the first- and second-order phase transitions, thus also the tricritical and critical end points are observed. We have also found that the model gives up to four compensation temperatures for appropriate values of the system parameters.

Suggested Citation

  • Albayrak, E., 2007. "Mixed spin-2 and spin-52 Blume–Emery–Griffiths model," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 375(1), pages 174-184.
    • Handle: RePEc:eee:phsmap:v:375:y:2007:i:1:p:174-184
    DOI: 10.1016/j.physa.2006.08.054
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