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cond-mat.stat-mech2010★ 8 cited
Phase diagram of the antiferromagnetic XY model in two dimensions in a magnetic field
A. S. T. Pires, B. V. Costa, R. A. Dias
The phase diagram of the quasi-two-dimensional easy-plane antiferromagnetic model, with a magnetic field applied in the easy plane, is studied using the self-consistent harmonic ap…
cond-mat.stat-mech2006★ 5 cited
Free energy variational approach for the classical anisotropic XY model in a crystal field
L. M. Castro, A. S. T. Pires, J. A. Plascak
A variational approach for the free energy is used to study the three-dimensional anisotropic XY model in the presence of a crystal field. The magnetization and the phase diagrams…