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Thermodynamics properties of an anisotropic Ising antiferromagnet in both external longitudinal and transverse fields

Author

Listed:
  • do Nascimento, Denise A.
  • Neto, Minos A.
  • de Sousa, J. Ricardo
  • Pacobahyba, J.T.M.

Abstract

We have studied the anisotropic two-dimensional nearest-neighbor Ising model with competitive interactions in both uniform longitudinal field H and transverse magnetic field Ω. Using the effective-field theory (EFT) with correlation in cluster with N=1 spin we calculate the thermodynamic properties as a function of temperature with values H and Ω fixed. The model consists of ferromagnetic interaction Jx in the x direction and antiferromagnetic interaction Jy in the y direction, and it is found that for H/Jy∈[0,2] the system exhibits a second-order phase transition. The thermodynamic properties are obtained for the particular case of λ=Jx/Jy=1 (isotropic square lattice).

Suggested Citation

  • do Nascimento, Denise A. & Neto, Minos A. & de Sousa, J. Ricardo & Pacobahyba, J.T.M., 2013. "Thermodynamics properties of an anisotropic Ising antiferromagnet in both external longitudinal and transverse fields," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 392(21), pages 5313-5321.
    • Handle: RePEc:eee:phsmap:v:392:y:2013:i:21:p:5313-5321
    DOI: 10.1016/j.physa.2013.06.064
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