期刊
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
卷 360, 期 2, 页码 379-390出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physa.2005.07.012
关键词
Ising model; bathroom tile lattice; mixed-spin; exact results
Effect of uniaxial single-ion anisotropy upon magnetic properties of a mixed spin-1/2 and spin-S (S >= 1) Ising model on a bathroom tile (4-8) lattice is examined within the framework of an exact star-triangle mapping transformation. Particular attention is focused on the phase diagrams established for several values of the quantum spin number S. It is shown that the mixed-spin bathroom tile lattice exhibits very similar phase boundaries as the mixed-spin honeycomb lattice whose critical points are merely slightly enhanced with respect to the former ones. The influence of uniaxial single-ion anisotropy upon the total magnetization vs. temperature dependence is particularly investigated as well. (c) 2005 Elsevier B.V. All rights reserved.
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