Enhanced Nonadiabaticity in Vortex Cores due to the Emergent Hall Effect

被引：29

作者：

Bisig, Andre ^{[1
,2
,3
,4
,5
]}

Akosa, Collins Ashu ^{[6
]}

Moon, Jung-Hwan ^{[7
]}

Rhensius, Jan ^{[1
,4
]}

Moutafis, Christoforos ^{[1
,3
,4
]}

von Bieren, Arndt ^{[1
,3
,4
]}

Heidler, Jakoba ^{[1
,3
,4
]}

Kiliani, Gillian ^{[1
]}

Kammerer, Matthias ^{[2
]}

Curcic, Michael ^{[2
]}

Weigand, Markus ^{[2
]}

Tyliszczak, Tolek ^{[8
]}

Van Waeyenberge, Bartel ^{[9
]}

Stoll, Hermann ^{[2
]}

Schuetz, Gisela ^{[2
]}

Lee, Kyung-Jin ^{[7
,10
]}

Manchon, Aurelien ^{[6
]}

Klaeui, Mathias ^{[1
,3
,4
,5
]}

机构：

[1] Univ Konstanz, Dept Phys, D-78457 Constance, Germany

[2] Max Planck Inst Intelligent Syst, D-70569 Stuttgart, Germany

[3] Ecole Polytech Fed Lausanne, Inst Condensed Matter Phys, CH-1015 Lausanne, Switzerland

[4] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[5] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[6] KAUST, Phys Sci & Engn Div, Thuwal 239556900, Saudi Arabia

[7] Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea

[8] Univ Calif Berkeley, LBL, Adv Light Source, Berkeley, CA 94720 USA

[9] Univ Ghent, Dept Solid State Sci, B-9000 Ghent, Belgium

[10] Korea Univ, KU KIST Grad Sch Converging Sci & Technol, Seoul 136713, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 27期

基金：

瑞士国家科学基金会;

关键词：

DOMAIN-WALL MOTION; SPIN; DYNAMICS; EXCITATION; SKYRMIONS;

D O I：

10.1103/PhysRevLett.117.277203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a combined theoretical and experimental study, investigating the origin of the enhanced nonadiabaticity of magnetic vortex cores. Scanning transmission x-ray microscopy is used to image the vortex core gyration dynamically to measure the nonadiabaticity with high precision, including a high confidence upper bound. We show theoretically, that the large nonadiabaticity parameter observed experimentally can be explained by the presence of local spin currents arising from a texture induced emergent Hall effect. This study demonstrates that the magnetic damping alpha and nonadiabaticity parameter beta are very sensitive to the topology of the magnetic textures, resulting in an enhanced ratio (beta/alpha>1) in magnetic vortex cores or Skyrmions.

引用

页数：6

共 45 条

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