Dynamics and inertia of skyrmionic spin structures

被引：298

作者：

Buettner, Felix ^{[1
,2
,3
]}

Moutafis, C. ^{[4
]}

Schneider, M. ^{[3
]}

Krueger, B. ^{[1
]}

Guenther, C. M. ^{[3
]}

Geilhufe, J. ^{[5
]}

Schmising, C. von Kor ^{[3
]}

Mohanty, J. ^{[3
]}

Pfau, B. ^{[3
]}

Schaffert, S. ^{[3
]}

Bisig, A. ^{[1
]}

Foerster, M. ^{[1
]}

Schulz, T. ^{[1
]}

Vaz, C. A. F. ^{[1
,6
]}

Franken, J. H. ^{[7
]}

Swagten, H. J. M. ^{[7
]}

Klaeui, M. ^{[1
]}

Eisebitt, S. ^{[3
,5
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Phys, D-55128 Mainz, Germany

[2] Grad Sch Excellence Mat Sci Mainz, D-55128 Mainz, Germany

[3] Tech Univ Berlin, Inst Opt & Atomare Phys, D-10623 Berlin, Germany

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

[5] Helmholtz Zentrum Berlin Mat & Energie GmbH, D-14109 Berlin, Germany

[6] Paul Scherrer Inst, SwissFEL, CH-5232 Villigen, Switzerland

[7] Eindhoven Univ Technol, Ctr NanoMat, Dept Appl Phys, NL-5600 MB Eindhoven, Netherlands

来源：

NATURE PHYSICS | 2015年 / 11卷 / 03期

基金：

欧盟第七框架计划; 瑞士国家科学基金会; 欧洲研究理事会;

关键词：

MAGNETIC DOMAIN-WALLS; NANOSTRUCTURES;

D O I：

10.1038/NPHYS3234

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Skyrmions are topologically protected winding vector fields characterizedby a spherical topology(1). Magnetic skyrmions can arise as the result of the interplay of various interactions, including exchange, dipolar and anisotropy energy in the case of magnetic bubbles(2-4) and an additional Dzyaloshinskii-Moriya interaction in the case of chiral skyrmions(5). Whereas the static and low-frequency dynamics of skyrmions are already well under control(6-9), their gigahertz dynamical behaviour(2) has not been directly observed in real space. Here, we image the gigahertz gyrotropic eigenmode dynamics of a single magnetic bubble and use its trajectory to experimentally confirm its skyrmion topology. The particular trajectory points to the presence of strong inertia, with a mass much larger than predicted by existing theories. This mass is endowed by the topological confinement of the skyrmion and the energy associated with its size change. It is thereby expected to be found in all skyrmionic structures in magnetic systems and beyond. Our experiments demonstrate that the mass term plays a key role in describing skyrmion dynamics.

引用

页码：225 / 228

页数：4

共 30 条

[1] Stable skyrmions in two-component Bose-Einstein condensates [J].