Theory for disordered phase in Heisenberg and non-Heisenberg two-dimensional S=1 ferromagnets

被引：3

作者：

Spirin, DV ^{[1
]}

Fridman, YA ^{[1
]}

机构：

[1] Taurida Natl Univ, UA-95007 Simferopol, Ukraine

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2003年 / 260卷 / 1-2期

关键词：

isotropic Heisenberg and non-Heisenberg ferromagnets; Hubbard operators; bosonization technique;

D O I：

10.1016/S0304-8853(02)01331-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We apply a modification of self-consistent spin-wave theory to investigation of two-dimensional S = 1 isotropic Heisenberg and non-Heisenberg ferromagnets at nonzero temperatures. We use Hubbard operators method and bosonization technique. We calculated chemical potential and found dependence of correlation length on temperature. Specific heat has Schottky-type peak and decreases at high temperatures. Disordered phase in non-Heisenberg ferromagnet is also studied. The results for such a model differ from those of Heisenberg one. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：215 / 221

页数：7

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