Field induced ordering in highly frustrated antiferromagnets

被引：97

作者：

Zhitomirsky, ME ^{[1
]}

Honecker, A

Petrenko, OA

机构：

[1] ETH Honggerberg, CH-8093 Zurich, Switzerland

[2] Tech Univ Braunschweig, Inst Theoret Phys, D-38106 Braunschweig, Germany

[3] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[4] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.85.3269

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We predict that an external field can induce a spin ordering in highly frustrated classical Heisenberg magnets. We find analytically stabilization of collinear states by thermal fluctuations at a one-third of the saturation field for kagome and garnet lattices and at a half of the saturation field for pyrochlore and frustrated square lattices. This effect is studied numerically for the frustrated square-lattice antiferromagnet by Monte Carlo simulations for classical spins and by exact diagonalization for S = 1/2. The field induced collinear states have a spin gap and produce magnetization plateaus.

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页码：3269 / 3272

页数：4

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