ENHANCEMENT OF ANISOTROPY DUE TO FLUCTUATIONS IN QUASI-ONE-DIMENSIONAL ANTIFERROMAGNETS

被引：10

作者：

ABANOV, AG ^{[1
]}

PETRENKO, OA ^{[1
]}

机构：

[1] MCMASTER UNIV,DEPT PHYS & ASTRON,HAMILTON L8S 4M1,ONTARIO,CANADA

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.50.6271

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It is shown that the observed anisotropy of magnetization at high magnetic fields in RbMnBr3, a quasi-one-dimensional antiferromagnet on a distorted. stacked triangular lattice, is due to quantum and thermal fluctuations. These fluctuations are taken into account in the framework of linear spin-wave theory in the region of strong magnetic fields. In this region the divergent one-dimensional integrals are cut off by magnetic field and the bare easy-plane anisotropy. Logarithmical dependence on the cutoff leads to the ''enhancement'' of the anisotropy in magnetization. Comparison between magnetization data and our theory with parameters obtained from neutron scattering experiments has been done.

引用

页码：6271 / 6276

页数：6

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