Spin liquid versus spin solid in A-site spinels

被引：24

作者：

Krimmel, A. ^{[1
]}

Tsurkan, V.

Sheptyakov, D.

Loldl, A.

机构：

[1] Univ Augsburg, Ctr Elect Correlat & Magnetism, D-86159 Augsburg, Germany

[2] ETH, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[3] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

来源：

PHYSICA B-CONDENSED MATTER | 2006年 / 378-80卷

关键词：

spin liquids; frustration; neutron scattering;

D O I：

10.1016/j.physb.2006.01.413

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Spinel compounds of stoichiometry AB(2)X(4) with magnetic A-site cations exhibit strong frustration effects. Frustration leads to strongly enhanced spin fluctuations that can easily suppress long range magnetic order (corresponding to a spin solid state) resulting in a dynamic spin liquid ground state. The same argument holds true for the orbital sector if an orbital moment is present. Neutron scattering is ideally suited to investigate the corresponding correlation functions. Here we present neutron diffraction studies on the A-site spinels MAl2O4 (M = Co, Fe, Mn). Whereas the Mn compound representing a spin-only system shows long range magnetic order below 42 K, the diffraction patterns of the Fe and Co spinel reveal a characteristic liquid Structure factor of the magnetic scattering. This contrasting behavior can be related to the absence/presence of an orbital moment. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：583 / 584

页数：2

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