EPR studies of the triangular-lattice antiferromagnet Cs2CuBr4

被引：2
|
作者：
Schulze, E. [1 ,2 ]
Ponomaryov, A. N. [1 ]
Wosnitza, J. [1 ,2 ]
Tanaka, H. [3 ]
Zvyagin, S. A. [1 ]
机构：
[1] Helmholtz Zentrum Dresden Rossendorf, Dresden High Magnet Field Lab HLD EMFL, D-01328 Dresden, Germany
[2] TUDresden, Inst Festkorperphys, D-01069 Dresden, Germany
[3] Tokyo Inst Technol, Tokyo 1528550, Japan
来源：
LOW TEMPERATURE PHYSICS | 2017年 / 43卷 / 11期
关键词：
ANTISYMMETRIC EXCHANGE; CUGEO3; LINEWIDTHS;
D O I：
10.1063/1.5010318
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The spin dynamics of the spin-1/2 triangular-lattice antiferromagnet Cs2CuBr4 is probed by means of high-frequency electron paramagnetic resonance (EPR) spectroscopy. Temperature dependences of EPR parameters are studied in a broad temperature range between 1.4 and 200 K for different orientations of the applied magnetic field. In the high-temperature regime (T >> J/k(B)), an unusually broad and anisotropic resonance line is detected, suggesting a sizeable Dzyaloshinskii-Moriya interaction. Employing the theory of exchange narrowing, the ratio of the Dzyaloshinskii-Moriya vector components, D-c/D-a approximate to 0.3, is estimated. Published by AIP Publishing.
引用
收藏
页码：1311 / 1314
页数：4
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