Nonreciprocal magnon propagation in a noncentrosymmetric ferromagnet LiFe5O8

被引：91

作者：

Iguchi, Y. ^{[1
]}

Uemura, S. ^{[1
]}

Ueno, K. ^{[1
]}

Onose, Y. ^{[1
]}

机构：

[1] Univ Tokyo, Dept Basic Sci, Tokyo 1538902, Japan

来源：

PHYSICAL REVIEW B | 2015年 / 92卷 / 18期

基金：

日本学术振兴会;

关键词：

WEAK FERROMAGNETISM; SPIN-WAVES; ANISOTROPY; EXCHANGE; CRYSTALS;

D O I：

10.1103/PhysRevB.92.184419

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In noncentrosymmetric materials, the relativistic effect extensively modifies the energy band of magnons as well as that of electrons. With use of microfabricated microwave antennae, we have demonstrated that the propagation of magnons with large momentum is nonreciprocal in a noncentrosymmetric ferromagnet LiFe5O8. The nonreciprocity is clearly explained by the effect of the asymmetric magnon band originating from the relativistic Dzyaloshinskii-Moriya interaction. This result may pave a new path to designing a magnonic device based on the relativistic band engineering.

引用

页数：8

共 31 条

[11] A THERMODYNAMIC THEORY OF WEAK FERROMAGNETISM OF ANTIFERROMAGNETICS [J].