Article Dans Une Revue Physical Review B Année : 2024

Altermagnetic variants in thin films of Mn5Si3

Vincent Baltz

Résumé

The altermagnet candidate Mn5Si3 has attracted wide attention in the context of non-relativistic spin physics, due to its composition of light elements. However, the presumed structure of the altermagnetic phase had yet to be demonstrated. In this study, we demonstrate a hallmark of altermagnetism in Mn5Si3 thin films, namely the three options, or variants, for the checkerboard distribution of the magnetic Mn atoms. The magnetic symmetries were altered by field-rotation of the Néel vector along relevant crystal directions, resulting in anomalous Hall effect anisotropy. The experimental results in nanoscale devices were corroborated by a theoretical model involving atomic site dependent anisotropy and bulk Dzyaloshinskii-Moriya interaction for a single variant. These findings elevate Mn5Si3 from a candidate to a proven altermagnet.
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Dates et versions

hal-04714282 , version 1 (30-09-2024)
hal-04714282 , version 2 (06-01-2025)

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Javier Rial, Miina Leiviskä, Gregor Skobjin, Antonín Bad'Ura, Gilles Gaudin, et al.. Altermagnetic variants in thin films of Mn5Si3. Physical Review B, 2024, 110, pp.L220411. ⟨10.1103/PhysRevB.110.L220411⟩. ⟨hal-04714282v2⟩
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