SPIN-WAVE DYNAMICS OF 2-DIMENSIONAL ISOTROPIC DIPOLAR HONEYCOMB ANTIFERROMAGNETS

被引：24
作者：
PICH, C
SCHWABL, F
机构：
[1] Institut für Theoretische Physik, TU München
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1995年 / 148卷 / 1-2期
关键词：
This work has been supported by the German Federal Ministry for Research and Technology (BMiTT) under the contract number 03-SC2TUM;
D O I：
10.1016/0304-8853(95)00136-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The question of long-range order in two-dimensional isotropic dipolar Heisenberg antiferromagnets on a honeycomb lattice is studied. The excitation spectrum is evaluated, yielding via linear spin-wave theory a non vanishing order parameter at finite temperatures. The Neel temperature is calculated by the Green function method of Callen. For MnPS3, a quasi two-dimensional antiferromagnet, good agreement with the measured transition temperature is obtained. In addition it is shown that the dipolar interaction leads to an intermediate phase (T = O) when an external magnetic field is applied.
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页码：30 / 31
页数：2
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