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MA: Fachverband Magnetismus
MA 59: Posters Magnetism III
MA 59.18: Poster
Freitag, 20. März 2020, 09:00–12:00, P2/EG
Double Topological Hall Effect as a signature for Skyrmions and Antiskyrmions — •Pranava Keerthi Sivakumar1, Börge Göbel1, Edouard Lesne1, Anastasios Markou2, Jyotsna Gidugu1, James Taylor1, Hakan Deniz1, Jagannath Jena1, Claudia Felser2, Ingrid Mertig1,3, and Stuart.S.P. Parkin1 — 1Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany. — 2Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany. — 3Institute of Physics, Martin Luther University Halle-Wittenberg, 06120 Halle, Germany.
Topological magnetic textures such as skyrmions and antiskyrmions are typically observed in materials belonging to different symmetry groups where the bulk Dzyaloshinskii-Moriya interaction (DMI) is either isotropic or anisotropic and leads to the stabilization of either skyrmions or antiskyrmions respectively. Recently, both these topological objects were found in the same inverse Heusler crystal, whose D2d symmetry is expected to stabilize only antiskyrmions. In this poster, we report on the observation of two distinct peaks in the topological Hall effect (THE) exhibited by thin films of Mn2RhSn. These features are later shown, phenomenologically and through transport simulations, to be direct signatures of two topologically distinct chiral spin textures, namely skyrmions and antiskyrmions. Utilizing THE studies, we infer that skyrmions are predominantly stabilized at lower temperatures where dipolar interactions dominate, while antiskyrmions are present at higher temperatures over a wide range of magnetic fields.