SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 23: Poster Magnetism I
MA 23.64: Poster
Dienstag, 28. März 2023, 17:00–19:00, P1
Optimizing the growth of Mn3Sn thin films in order to investigate magneto-optical Kerr effect, anomalous Nernst effect, and spin-orbit torque switching — •Anagha Mathew1,2, Srishti Dongare1, Atul Pandey1,2, James M Taylor1, Binoy K Hazra2, Stuart SP Parkin2, and Georg Woltersdorf1,2 — 1Institute of Physics, Martin Luther University Halle-Wittenberg, 06120 Halle, Germany — 2Max Planck Institute for Microstructure Physics, 06120 Halle, Germany
Mn3Sn is a promising candidate material for antiferromagnetic spintronic devices, because of its large magneto-transport responses, such as the anomalous Hall effect (AHE), arising from topological band structure features. For future applications, it is important to be able to efficiently reverse the sense of rotation of its noncollinear spin texture on short timescales via spin torques. Achieving this requires a more detailed understanding of such switching mechanisms, in particular the role of chiral domains. To this end, we have optimized the growth of Mn3Sn films, to show low coercive field and a large fractional change of AHE during spin-orbit torque switching. In addition, these thin films demonstrate significant magneto-optical Kerr effect and anomalous Nernst effect arising from Berry curvature generated by their noncollinear spin texture. We exploit these measurement techniques to map the chiral domain structure of the Mn3Sn films in an optical and electro-optical manner, respectively.