SKM 2023 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 40: Poster Magnetism II

MA 40.63: Poster

Donnerstag, 30. März 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 Thomas^1,6, Libor Šmejkal⁷, Jairo Sinova⁷, Tomáš Jungwirth², Lisa Michez⁵, Sebastian T. B. Goennenwein⁸, Vincent Baltz³, and Helena Reichlová^1,2 — ¹TU 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).