Direct Observation of the Dzyaloshinskii-Moriya Interaction in a Pt/Co/Ni Film

被引：300

作者：

Di, Kai ^{[1
]}

Zhang, Vanessa Li ^{[1
]}

Lim, Hock Siah ^{[1
]}

Ng, Ser Choon ^{[1
]}

Kuok, Meng Hau ^{[1
]}

Yu, Jiawei ^{[2
]}

Yoon, Jungbum ^{[2
]}

Qiu, Xuepeng ^{[2
]}

Yang, Hyunsoo ^{[2
]}

机构：

[1] Natl Univ Singapore, Dept Phys, Singapore 117551, Singapore

[2] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

MAGNETIC DOMAIN-WALLS; WEAK FERROMAGNETISM; SPIN; TEMPERATURE; ANISOTROPY; SKYRMIONS; DYNAMICS; SURFACE; WAVES;

D O I：

10.1103/PhysRevLett.114.047201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The interfacial Dzyaloshinskii-Moriya interaction in an in-plane anisotropic Pt(4 nm)/Co(1.6 nm)/Ni(1.6 nm) film has been directly observed by Brillouin spectroscopy. It is manifested as the asymmetry of the measured magnon dispersion relation, from which the Dzyaloshinskii-Moriya interaction constant has been evaluated. Linewidth measurements reveal that the lifetime of the magnons is asymmetric with respect to their counter-propagating directions. The lifetime asymmetry is dependent on the magnon frequency, being more pronounced, the higher the frequency. Analytical calculations of the magnon dispersion relation and linewidth agree well with experiments.

引用

页数：5

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