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Magnetocaloric effect in the Jx−Jy Blume–Capel model

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  • Guerrero, Alejandra I.

Abstract

The magnetocaloric properties of the Jx−Jy Blume–Capel model with Jx/Jy=−0.5 are studied using the two point approximation of the Cluster Variation Method. The phase diagrams exhibit different phases depending on the anisotropy parameter, magnetic field, temperature and exchange interaction ratio. It is shown how the nature of the phase transition changes as parameters are varied. For an anisotropy parameter value of D=1.45, a tricritical point and a reentrant behavior are identified. It was found inverse and direct magnetocaloric effect. The inverse magnetocaloric effect of the model is enhanced at low fields and temperatures around jumps between plateaus of magnetization.

Suggested Citation

  • Guerrero, Alejandra I., 2023. "Magnetocaloric effect in the Jx−Jy Blume–Capel model," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 623(C).
    • Handle: RePEc:eee:phsmap:v:623:y:2023:i:c:s0378437123004478
    DOI: 10.1016/j.physa.2023.128892
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    References listed on IDEAS

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    1. Sanchez, J.M. & Ducastelle, F. & Gratias, D., 1984. "Generalized cluster description of multicomponent systems," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 128(1), pages 334-350.
    2. Si, Nan & Zhang, Fan & Jiang, Wei & Zhang, Yan-Li, 2018. "Magnetic and thermodynamics properties graphene monolayer with defects," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 510(C), pages 641-648.
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