Topological Hall effect for electron scattering on nanoscale skyrmions in external magnetic field

被引：9

作者：

Denisov, K. S. ^{[1
,2
]}

Rozhansky, I., V ^{[1
,2
]}

Potkina, M. N. ^{[3
,4
,5
]}

Lobanov, I. S. ^{[6
]}

Lahderanta, E. ^{[2
]}

Uzdin, V. M. ^{[3
,6
]}

机构：

[1] Ioffe Inst, Ctr Nanoheterostruct Phys, St Petersburg 194021, Russia

[2] Lappeenranta Univ Technol, Sch Engn Sci, FI-53851 Lappeenranta, Finland

[3] St Petersburg State Univ, Dept Phys, St Petersburg 198504, Russia

[4] Univ Iceland, Sci Inst, VR-3, IS-107 Reykjavik, Iceland

[5] Univ Iceland, Fac Phys Sci, VR-3, IS-107 Reykjavik, Iceland

[6] ITMO Univ, St Petersburg 197101, Russia

来源：

PHYSICAL REVIEW B | 2018年 / 98卷 / 21期

基金：

俄罗斯科学基金会;

关键词：

ROOM-TEMPERATURE; STABILITY; MOMENTUM; DYNAMICS; STATES;

D O I：

10.1103/PhysRevB.98.214407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We consider topological Hall effect (THE) in thin ferromagnetic films due to electron scattering on nanoscale magnetic skyrmions in the presence of the strong external magnetic field. We account for the effect of the magnetic field on a skyrmion structure and describe the hallmarks of THE differentiating it from ordinary and anomalous Hall effects. We have found that, although in typical ferromagnets the variation of magnetic field substantially affects the skyrmion size, THE changes rather weakly remaining quite robust. Therefore, the magnitude of THE is primarily determined by the skyrmions sheet density n(sk), i.e., for PdFe/Ir(111) it is comparable to the magnitude of the ordinary Hall effect (OHE) at n(sk) = 10(-11) cm(-2). The sign of THE is opposite to that of OHE for skyrmions with positive vorticity, while for antiskyrmions the signs are the same.

引用

页数：8

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