Spin-Lattice Order in Frustrated ZnCr2O4

被引：78

作者：

Ji, S. ^{[1
,2
]}

Lee, S. -H. ^{[1
]}

Broholm, C. ^{[3
]}

Koo, T. Y. ^{[4
]}

Ratcliff, W. ^{[2
]}

Cheong, S. -W. ^{[5
]}

Zschack, P. ^{[6
]}

机构：

[1] Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA

[2] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

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

[4] Pohang Univ Sci & Technol, Pohang Accelerator Lab, Pohang 790784, South Korea

[5] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[6] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 03期

关键词：

PYROCHLORE ANTIFERROMAGNET; LIQUID; MAGNET; STATE;

D O I：

10.1103/PhysRevLett.103.037201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using synchrotron x-ray and neutron diffraction, we disentangle spin-lattice order in highly frustrated ZnCr2O4 where magnetic chromium ions occupy the vertices of regular tetrahedra. Upon cooling below 12.5 K the quandary of antialigning spins surrounding the triangular faces of tetrahedra is resolved by establishing weak interactions on each triangle through an intricate lattice distortion. However, the resulting spin order is not simply a Neacuteel state on strong bonds, but rather a complex coplanar spin structure, indicating that antisymmetric and/or further neighbor exchange interactions also play a role as ZnCr2O4 resolves conflicting magnetic interactions.

引用

页数：4

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