2-SITE CLUSTER THEORY FOR THE SPIN-ONE ISING-MODEL

被引：20
|
作者：
TUCKER, JW
机构：
[1] Department of Physics, University of Sheffield, Sheffield
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1990年 / 87卷 / 1-2期
关键词：
D O I：
10.1016/0304-8853(90)90188-V
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A two-site cluster effective field theory in which all the single site kinematic relations are correctly accounted for is applied to a study of the spin-one Ising ferromagnet with the inclusion of biquadratic exchange and single-ion anisotropy. The theory is developed in detail for the honeycomb lattice and the second-order phase boundary and tricritical points are found for a range of interaction strengths. The results are compared to those of the single-site cluster theory recently reported in the literature as well as to other methods. © 1990.
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页码：16 / 22
页数：7
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