Spin-Wave Instabilities and Noncollinear Magnetic Phases of a Geometrically Frustrated Triangular-Lattice Antiferromagnet

被引：26

作者：

Haraldsen, J. T. ^{[1
]}

Swanson, M. ^{[1
,2
]}

Alvarez, G. ^{[3
,4
]}

Fishman, R. S. ^{[1
]}

机构：

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

[2] N Dakota State Univ, Dept Phys, Fargo, ND 58105 USA

[3] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA

[4] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 23期

关键词：

CUFEO2;

D O I：

10.1103/PhysRevLett.102.237204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

This Letter examines the relation between the spin-wave instabilities of collinear magnetic phases and the resulting noncollinear phases for a geometrically frustrated triangular-lattice antiferromagnet in the high-spin limit. Using a combination of phenomenological and Monte Carlo techniques, we demonstrate that the instability wave vector with the strongest intensity in the collinear phase determines the wave vector of a cycloid or the dominant elastic peak of a more complex noncollinear phase. Our results are related to the observed multiferroic phase of Al-doped CuFeO(2).

引用

页数：4

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