On the mean-field theory of a two-sublattice antiferromagnet

被引：2
|
作者：
Zvyagin, A. A. [1 ]
Skorobagat'ko, G. A.
机构：
[1] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[2] Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
来源：
LOW TEMPERATURE PHYSICS | 2006年 / 32卷 / 07期
关键词：
D O I：
10.1063/1.2216229
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Numerical solutions of the mean-field theory of a two-sublattice antiferromagnet with a strong crystalline electric field are studied. The validity of the solutions is checked with the help of known analytical results for the special case of the lowest doublet (S=1/2). For larger values of the lowest multiplet (S > 1/2) the temperature and magnetic field dependencies of the antiferromagnetic order parameter and the total magnetization are calculated and their features are analyzed. We predict new re-entrant phase transitions between Neel and paramagnetic phases for S >= 1. (c) 2006 American Institute of Physics.
引用
收藏
页码：644 / 649
页数：6
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