Noncollinear magnetic phases of a triangular-lattice antiferromagnet and of doped CuFeO2

被引：31

作者：

Fishman, Randy S. ^{[1
]}

Okamoto, Satoshi ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 02期

关键词：

MULTIFERROICS;

D O I：

10.1103/PhysRevB.81.020402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We obtain the noncollinear ground states of a triangular-lattice antiferromagnet with exchange interactions up to third nearest neighbors as a function of the single-ion anisotropy D. At a critical value of D, the collinear up arrow up arrow down arrow down arrow phase transforms into a complex noncollinear phase with odd-order harmonics of the fundamental ordering wavevector Q. The observed elastic peaks at 2 pi x - Q in both Al- and Ga-doped CuFeO2 are explained by a "scalene" distortion of the triangular-lattice produced by the repulsion of neighboring oxygen atoms.

引用

页数：4

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