Spin chirality fluctuation in two-dimensional ferromagnets with perpendicular magnetic anisotropy

被引：108

作者：

Wang, Wenbo ^{[1
]}

Daniels, Matthew W. ^{[2
,3
]}

Liao, Zhaoliang ^{[4
,5
]}

Zhao, Yifan ^{[6
]}

Wang, Jun ^{[5
]}

Koster, Gertjan ^{[5
]}

Rijnders, Guus ^{[5
]}

Chang, Cui-Zu ^{[6
]}

Xiao, Di ^{[3
]}

Wu, Weida ^{[1
]}

机构：

[1] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[2] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA

[3] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA

[4] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei, Anhui, Peoples R China

[5] Univ Twente, MESA Inst Nanotechnol, Enschede, Netherlands

[6] Penn State Univ, Dept Phys, 104 Davey Lab, University Pk, PA 16802 USA

来源：

NATURE MATERIALS | 2019年 / 18卷 / 10期

关键词：

BERRY PHASE; HALL; REVERSAL;

D O I：

10.1038/s41563-019-0454-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Non-coplanar spin textures with scalar spin chirality can generate an effective magnetic field that deflects the motion of charge carriers, resulting in a topological Hall effect (THE)(1-3). However, spin chirality fluctuations in two-dimensional ferromagnets with perpendicular magnetic anisotropy have not been considered so far. Here, we report evidence of spin chirality fluctuations by probing the THE above the Curie temperature in two different ferromagnetic ultra-thin films, SrRuO3 and V-doped Sb2Te3. The temperature, magnetic field, thickness and carrier-type dependence of the THE signal, along with Monte Carlo simulations, suggest that spin chirality fluctuations are a common phenomenon in two-dimensional ferromagnets with perpendicular magnetic anisotropy. Our results open a path for exploring spin chirality with topological Hall transport in two-dimensional magnets and beyond(4-7).

引用

页码：1054 / +

页数：7

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