Large magneto-optical Kerr effect and imaging of magnetic octupole domains in an antiferromagnetic metal

被引：351

作者：

Higo, Tomoya ^{[1
,2
]}

Man, Huiyuan ^{[1
]}

Gopman, Daniel B. ^{[3
]}

Wu, Liang ^{[4
,5
,6
]}

Koretsune, Takashi ^{[2
,7
,8
]}

van't Erve, Olaf M. J. ^{[9
]}

Kabanov, Yury P. ^{[3
,10
]}

Rees, Dylan ^{[4
,5
]}

Li, Yufan ^{[11
]}

Suzuki, Michi-To ^{[2
,8
]}

Patankar, Shreyas ^{[4
,5
]}

Ikhlas, Muhammad ^{[1
,2
]}

Chien, C. L. ^{[11
]}

Arita, Ryotaro ^{[2
,8
]}

Shull, Robert D. ^{[3
]}

Orenstein, Joseph ^{[4
,5
]}

Nakatsuji, Satoru ^{[1
,2
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba, Japan

[2] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama, Japan

[3] NIST, Mat Sci & Engn Div, Gaithersburg, MD 20899 USA

[4] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[5] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA USA

[6] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA

[7] Tohoku Univ, Dept Phys, Sendai, Miyagi, Japan

[8] RIKEN CEMS, Wako, Saitama, Japan

[9] US Naval Res Lab, Div Mat Sci & Technol, Washington, DC USA

[10] Russian Acad Sci, Inst Solid State Phys, Chernogolovka, Moscow Region, Russia

[11] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

来源：

NATURE PHOTONICS | 2018年 / 12卷 / 02期

基金：

日本科学技术振兴机构;

关键词：

WEAK FERROMAGNETISM; FARADAY; MN3SN; ORTHOFERRITES; ANISOTROPY; ROTATION; GARNETS;

D O I：

10.1038/s41566-017-0086-z

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The magneto-optical Kerr effect (MOKE) has been intensively studied in a variety of ferro-and ferrimagnetic materials as a powerful probe for electronic and magnetic properties(1-3) and for magneto-optical technologies(4). The MOKE can be additionally useful for the investigation of the antiferromagnetic (AF) state, although thus far limited to insulators(5-9). Here, we report the first observation of the MOKE in an AF metal. In particular, we find that the non-collinear AF metal Mn3Sn (ref. 10) exhibits a large zero-field Kerr rotation angle of 20 mdeg at room temperature, comparable to ferromagnetic metals. Our first-principles calculations clarify that ferroic ordering of magnetic octupoles(11) produces a large MOKE even in its fully compensated AF state. This large MOKE further allows imaging of the magnetic octupole domains and their reversal. The observation of a large MOKE in an AF metal will open new avenues for the study of domain dynamics as well as spintronics using antiferromagnets(12-16)

引用

页码：73 / +

页数：8

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