Microwave nonreciprocity of magnon excitations in the noncentrosymmetric antiferromagnet Ba2MnGe2O7

被引：14
|
作者：
Iguchi, Y. [1 ]
Nii, Y. [1 ]
Kawano, M. [1 ]
Murakawa, H. [2 ]
Hanasaki, N. [2 ]
Onose, Y. [1 ,3 ]
机构：
[1] Univ Tokyo, Dept Basic Sci, Tokyo 1538902, Japan
[2] Osaka Univ, Dept Phys, Osaka 5600043, Japan
[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
来源：
PHYSICAL REVIEW B | 2018年 / 98卷 / 06期
基金：
日本学术振兴会;
关键词：
D O I：
10.1103/PhysRevB.98.064416
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have investigated the microwave nonreciprocity for a noncentrosymmetric antiferromagnet Ba2MnGe2O7. The magnon modes expected by the conventional spin wave theory for staggered antiferromagnets are certainly observed. The magnitudes of exchange interaction and magnetic anisotropy are obtained by the comparison with the theory. The microwave nonreciprocity is identified for one of these modes. The relative magnitude of microwave nonreciprocity can be explained with the use of spin wave theory and Kubo formula.
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页数：5
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