Detection of antiskyrmions by topological Hall effect in Heusler compounds

Abstract

Heusler compounds having D2d crystal symmetry gained much attention recently due to the stabilization of a vortexlike spin texture called antiskyrmions in thin lamellae of Mn1.4Pt0.9Pd0.1Sn as reported in the work of Nayak et al. [Nature (London) 548, 561 (2017)10.1038/nature23466]. Here we show that bulk Mn1.4Pt0.9Pd0.1Sn undergoes a spin-reorientation transition from a collinear ferromagnetic to a noncollinear configuration of Mn moments below 135 K, which is accompanied by the emergence of a topological Hall effect. We tune the topological Hall effect in Pd and Rh substituted Mn1.4PtSn Heusler compounds by changing the intrinsic magnetic properties and spin textures. A unique feature of the present system is the observation of a zero-field topological Hall resistivity with a sign change which indicates the robust formation of antiskyrmions. © 2020 authors. Published by the American Physical Society.

Description
Keywords
Crystal symmetry, Manganese alloys, Platinum alloys
Citation
Kumar, V., Kumar, N., Reehuis, M., Gayles, J., Sukhanov, A. S., Hoser, A., et al. (2020). Detection of antiskyrmions by topological Hall effect in Heusler compounds. 101(1). https://doi.org//10.1103/PhysRevB.101.014424
Collections
License
CC BY 4.0 Unported