Structural, orbital, and magnetic order in vanadium spinels

被引：148

作者：

Tchernyshyov, O ^{[1
]}

机构：

[1] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 15期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.93.157206

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Vanadium spinels (ZnV2O4, MgV2O4, and CdV2O4) exhibit a sequence of structural and magnetic phase transitions, reflecting the interplay of lattice, orbital, and spin degrees of freedom. We offer a theoretical model taking into account the relativistic spin-orbit interaction, collective Jahn-Teller effect, and spin frustration. Below the structural transition, vanadium ions exhibit ferro-orbital order and the magnet is best viewed as two sets of antiferromagnetic chains with a single-ion Ising anisotropy. Magnetic order, parametrized by two Ising variables, appears at a tetracritical point.

引用

页码：157206 / 1

页数：4

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