Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 20: Focus Session: Revealing Multidimensional Spin Textures and their Dynamics via X-rays and Electrons
MA 20.6: Hauptvortrag
Mittwoch, 7. September 2022, 12:15–12:45, H37
Identification of complex spin-textures by novel Hall effects — •Juba Bouaziz1, Hiroshi Ishida2, Samir Lounis1, and Stefan Blügel1 — 1Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich & JARA, D-52425 Jülich, Germany — 2College of Humanities and Sciences, Nihon University, Sakurajosui, Tokyo 156-8550, Japan
Chiral magnetic phases of matter are commonly found in non-centrosymmetric materials. The complex magnetic order is stabilized by the Dzyaloshinskii-Moriya interaction, which promotes topologically non-trivial spin textures such as skyrmions. These entities imprint a characteristic signature on the Hall signal known as the topological Hall effect, allowing their detection employing magneto-transport measurements. In this talk, relying on perturbation theory, we disentangle the multiple contributions to the Hall signal originating from non-collinear magnetism and relativistic effects. We unveil a new contribution, the non-collinear Hall effect (NHE) [1], whose angular form is determined by the magnetic texture, the spin-orbit field of the electrons, and the underlying crystal structure. The NHE together with other components of the Hall resistivity enables the decoding of exotic non-collinear magnetic textures that have been observed in itinerant magnets [1,2]. The impact of the NHE on the Hall signal of several two and three-dimensional spin textures such as magnetic hopfions is examined. [1] J. Bouaziz et al. PRL 126, 147203 (2021), [2] A. Neubauer et al. PRL 102, 186602 (2009).