A Monte Carlo study of the spin-1 Blume–Emery–Griffiths phase diagrams within biquadratic exchange anisotropy

Ibtissam Dani, Najim Tahiri, Hamid Ez-Zahraouy and Abdelilah Benyoussef

Physica A: Statistical Mechanics and its Applications, 2014, vol. 407, issue C, 295-302

Abstract: The effect of the bi-quadratic exchange coupling anisotropy on the phase diagram of the spin-1 Blume–Emery–Griffiths model on simple-cubic lattice is investigated using mean field theory (MFT) and Monte Carlo simulation (MC). It is found that the anisotropy of the biquadratic coupling favors the stability of the ferromagnetic phase. By decreasing the parallel and/or perpendicular bi-quadratic coupling, the ferrimagnetic and the antiquadrupolar phases broaden in contrast, the ferromagnetic and the disordered phases become narrow. The behavior of magnetization and quadrupolar moment as a function of temperature is also computed, especially in the ferrimagnetic phase.

Keywords: Blume–Emery–Griffiths; Ferrimagnetisms; Tricritical behavior; Mean-field theory; Monte Carlo simulation (search for similar items in EconPapers)
Date: 2014
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:407:y:2014:i:c:p:295-302

DOI: 10.1016/j.physa.2014.04.006

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