Incommensurate spin spiral of the geometrically-frustrated antiferromagnet CdCr2O4

被引：11

作者：

Chung, Jae-Ho ^{[1
]}

Song, Young Sang ^{[1
]}

Park, Sungil ^{[2
]}

Ueda, Hiroaki ^{[3
]}

Ueda, Yutaka ^{[3
]}

Lee, Seung-Hun ^{[4
]}

机构：

[1] Korea Univ, Dept Phys, Seoul 136713, South Korea

[2] Korea Atom Energy Res Inst, HANARO Ctr, Taejon 305600, South Korea

[3] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

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

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2013年 / 62卷 / 12期

基金：

新加坡国家研究基金会;

关键词：

Geometrical frustration; Dzyloshinskii-Moriya exchange; Incommensurate magnetic order;

D O I：

10.3938/jkps.62.1900

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

CdCr2O4 is a cubic spinel with geometrically-frustrated antiferromagnetic interactions between Cr3+ ions. We investigated the structural and magnetic phase transitions in powder samples by using magnetization and neutron diffraction measurements. An antiferromagnetic phase transition was observed at T (N) = 8.1 K, below which the crystallographic unit cell was tetragonal (c < a = b). Its incommensurate antiferromagnetic ordering below T (N) resembles dimerized spin chains in the ab planes with the propagation vector k = (0, 0.088, 1). We argue that the Dzyaloshinskii-Moriya interaction and the magnetic frustration play important roles in establishing the observed magnetic ordering.

引用

页码：1900 / 1904

页数：5

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