Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 25: Skyrmions I (joint session MA/TT)

TT 25.5: Vortrag

Dienstag, 17. März 2020, 10:45–11:00, POT 6

Topological Hall effect in thin films of tetragonal inverse Heusler compounds — •Anastasios Markou1, Peter Swekis1, Jacob Gayles1, Dominik Kriegner1,2, and Claudia Felser11Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — 2Institut für Festkörper- und Materialphysik, TU Dresden

Spin chirality in metallic materials with noncoplanar spin structure gives rise to a Berry phase induced topological Hall effect (THE). Topologically stable nontrivial spin structures, such as skyrmions and antiskyrmions exhibit THE. The THE is a transverse response to an applied current that can be used to distinguish magnetic textures for device applications, such as the racetrack memory. We focus on the Heusler compounds with D2d symmetry [1,2], which recently found to host antiskyrmions [2]. We present the structural, magnetic, and transport properties in thin films of the tetragonal MnxPtSn (x=1.4-2.1) and Mn2RhSn Heusler compounds. We find that the THE appears below spin reorientation temperature, and together with the anomalous Hall effect are strongly dependent on the composition and thickness of the films.

[1]O. Meshcheriakova et al., Phys. Rev. Lett. 113, 087203 (2014).
[2]A. K. Nayak et al., Nature 548, 561-566 (2017).

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