Two-stage spin-flop transitions in the S=1/2 antiferromagnetic spin chain BaCu2Si2O7 -: art. no. 127203

被引：94

作者：

Tsukada, I

Takeya, J

Masuda, T

Uchinokura, K

机构：

[1] Cent Res Inst Elect Power Ind, Komae, Tokyo 2018511, Japan

[2] Univ Tokyo, Dept Adv Mat Sci, Bunkyo Ku, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.87.127203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Two-stage spin-flop transitions are observed in the quasi-one-dimensional antiferromagnet BaCu2Si2O7. A magnetic field applied along the easy axis induces a spin-flop transition at 2.0 T followed by a second transition at 4.9 T. The magnetic susceptibility indicates the presence of Dzyaloshinskii-Moriya (DM) antisymmetric interactions between the intrachain neighboring spins. We discuss a possible mechanism whereby the geometrical competition between DM and interchain interactions, as discussed for the two-dimensional antiferromagnet La2CuO4, causes the two-stage spin-flop transitions.

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页码：127203 / 127203

页数：4

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