Incommensurate spin spiral of the geometrically-frustrated antiferromagnet CdCr2O4

被引：0
|
作者：
Jae-Ho Chung
Young Sang Song
Sungil Park
Hiroaki Ueda
Yutaka Ueda
Seung-Hun Lee
机构：
[1] Korea University,Department of Physics
[2] Korea Atomic Energy Research Institute,HANARO Center
[3] The University of Tokyo,The Institute for Solid State Physics
[4] University of Virginia,Department of Physics
来源：
Journal of the Korean Physical Society | 2013年 / 62卷
关键词：
Geometrical frustration; Dzyloshinskii-Moriya exchange; Incommensurate magnetic order;
D O I：
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学科分类号：
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 TN = 8.1 K, below which the crystallographic unit cell was tetragonal (c < a = b). Its incommensurate antiferromagnetic ordering below TN 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.
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页码：1900 / 1904
页数：4
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