Weak ferromagnetism of quasi-one-dimensional S=1/2 antiferromagnet BaCu2Ge2O7

被引：56
|
作者：
Tsukada, I
Takeya, J
Masuda, T
Uchinokura, K
机构：
[1] Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan
[2] Univ Tokyo, Dept Adv Mat Sci, Bunkyo Ku, Tokyo 1138656, Japan
来源：
PHYSICAL REVIEW B | 2000年 / 62卷 / 10期
关键词：
D O I：
10.1103/PhysRevB.62.R6061
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Weak ferromagnetism of quasi-one-dimensional S = 1/2 antiferromagnet BaCu2Ge2O7 is Studied by the magnetization measurement. The spontaneous magnetization appears along the b axis below 8.8 K. The local symmetry between the intrachain nearest-neighbor spins allows the presence of the Dzyaloshinskii-Moriya interaction, and the only possible spatial configuration of the weak ferromagnetic moment per spin definitely determines the sign of the interchain interaction. A weak a-axis magnetic field can change the direction of the magnetization to the ct-axis direction, which shows that the spin chain forms a weakly coupled weak-ferromagnetic chain system.
引用
收藏
页码：R6061 / R6064
页数：4
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