Field-Induced Topological Hall Effect and Double-Fan Spin Structure with a c-Axis Component in the Metallic Kagome Antiferromagnetic Compound YMn6Sn6

Published

January 12, 2021

Author(s)

Qi Wang, Kelly J. Neubauer, Chunruo Duan, Qiangwei Yin, Satoru Fujitsu, Hideo Hosono, Feng Ye, Rui Zhang, Songxue Chi, Kathryn L. Krycka, Hechang Lei, Pengcheng Dai

Abstract

The geometrical frustration nature of the kagome lattice makes it a great host to flat electronic band, non-trivial topological properties, and novel magnetisms. Metallic kagome antiferromagnet YMn₆Sn₆ exhibits the topological Hall effect (THE) when an in-plane magnetic field is applied. THE is typically associated with the nanometer-sized non-coplanar spin structure of skyrmions in non-centrosymmetric magnets with large Dzyaloshinskii-Moriya interaction. Here we use single crystal neutron diffraction to determine the field/temperature dependence of the magnetic structure in YMn₆Sn₆. We find that the observed THE cannot arise from a magnetic skyrmion lattice, but instead from an in-plane field-induced double fan spin structure with c-axis components (DFC). Our work provides the experimental basis from which a microscopic theory can be established to understand the observed THE.

Citation

Physical Review B

Volume

103

Issue

1

Pub Type

Journals

Keywords

neutron scattering, kagome lattice, topological Hall effect

Citation

Wang, Q. , Neubauer, K. , Duan, C. , Yin, Q. , Fujitsu, S. , Hosono, H. , Ye, F. , Zhang, R. , Chi, S. , Krycka, K. , Lei, H. and Dai, P. (2021), Field-Induced Topological Hall Effect and Double-Fan Spin Structure with a c-Axis Component in the Metallic Kagome Antiferromagnetic Compound YMn₆Sn₆, Physical Review B (Accessed April 24, 2024)