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MA: Fachverband Magnetismus

MA 40: Poster Magnetism II

MA 40.63: Poster

Thursday, March 30, 2023, 14:00–16:00, P2/EG

Transverse magnetotransport in unconventional antiferromagnet Mn5Si3 — •Sebastian Beckert1, Antonin Bad’ura2, Miina Leiviskä3, Eva Schmoranzerová4, Ismaila Kounta5, Dominik Kriegner2, Andy Thomas1,6, Libor Šmejkal7, Jairo Sinova7, Tomáš Jungwirth2, Lisa Michez5, Sebastian T. B. Goennenwein8, Vincent Baltz3, and Helena Reichlová1,21TU Dresden — 2IoP ASCR Prague — 3Spintec Grenoble — 4Charles University Prague — 5CINaM Marseille — 6IFW Dresden — 7JGU Mainz — 8University of Konstanz

Traditional collinear antiferromagnets do not exhibit a spin polarization in the band structure. Therefore, the anomalous Hall and Nernst effect are forbidden in this materials. Recent theory developments predict a new class of magnetically ordered compensated materials with particular crystal and spin symmetries that break the time inversion symmetry in the reciprocal space [1,2]. One experimental demonstration are epitaxially grown Mn5Si3 films. In these samples with a (0001) film normal, we observe a robust anomalous Hall effect despite vanishing magnetization [3]. On this poster, we will discuss the magneto-thermal transport properties of this compound in more detail and the symmetry of measured signals.

[1] L. Šmejkal et al., Sci. Adv. 6, aaz8809 (2020).

[2] L. Šmejkal et al., Phys. Rev. X 12, 031042 (2022).

[3] H. Reichlova et al., arXiv preprint arXiv:2012.15651 (2020).

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