Field-induced topological Hall effect in the noncoplanar triangular antiferromagnetic geometry of Mn3Sn

被引：113

作者：

Rout, Pradeep K. ^{[1
]}

Madduri, P. V. Prakash ^{[1
]}

Manna, Subhendu K. ^{[1
]}

Nayakx, Ajaya K. ^{[1
]}

机构：

[1] HBNI, Sch Phys Sci, Natl Inst Sci Educ & Res, Jatni 752050, India

来源：

PHYSICAL REVIEW B | 2019年 / 99卷 / 09期

关键词：

PHASE;

D O I：

10.1103/PhysRevB.99.094430

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Noncollinear triangular antiferromagnets with a coplanar spin arrangement and vanishing net magnetic moment can exhibit a large anomalous Hall effect owing to their nonvanishing momentum space Berry curvature. Here we show the existence of a large field-induced topological Hall effect in the noncoplanar triangular antiferromagnetic geometry of Mn3Sn. A detailed magnetic and Hall effect measurements demonstrate the presence of three distinct Hall contributions: a high-temperature anomalous Hall effect, a low-temperature topological Hall effect, and an intermediate-temperature region with coexistence of both the effects. The origin of the observed topological Hall effect is attributed to the scalar spin chirality induced real-space Berry curvature that appears when the system goes from a trivial noncoplanar triangular spin alignment to a topologically protected nontrivial spin texture like skyrmions by application of magnetic field at low temperatures.

引用

页数：7

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