Determination of the Critical Behavior of the Antiferromagnetic Interaction Spin-1 System in an External Magnetic Field by Using the Constant-coupling Approximation


ERDİNÇ A., CANKO O.

JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol.56, no.4, pp.1046-1050, 2010 (Journal Indexed in SCI) identifier

  • Publication Type: Article / Review
  • Volume: 56 Issue: 4
  • Publication Date: 2010
  • Doi Number: 10.3938/jkps.56.1046
  • Title of Journal : JOURNAL OF THE KOREAN PHYSICAL SOCIETY
  • Page Numbers: pp.1046-1050

Abstract

The critical behavior of the antiferromagnetic interaction spin-1 system model in an external magnetic field is studied by using the constant-coupling approximation for four different nearest-neighbors coupling constant. First, we have investigated the thermal variations of the sublattice magnetizations for different values of the interaction parameters in an external magnetic field. The model exhibits distinct critical region, including the first-order, the second-order tricritical point, and the zero critical point region. Second, we have calculated the phase diagrams. Finally, a discussion and a comparison of the phase diagrams are given.