Investigating Antiferromag­netic Properties of CuMnAs by Transmission Electron Microscopy

Abstract:

High-quality thin films of tetragonal CuMnAs [1] were recently implemented in novel spintronic devices. These rely on different phenomena, for example Néel vector reorientation via spin-orbit coupling [2] or thermal quenching into high-resistivity states [3]. I will present the results of our attempts to use transmission electron microscopy to understand the magnetic structure of CuMnAs on the atomic scale [4]. These experiments help us not only to explain the physical mechanisms behind interesting functionalities of CuMnAs devices [5], but also get a better understanding of the crystalline/magnetic structure interplay in antiferromagnets.

[1] Krizek et al., Phys. Rev. Mater. 4 (2020).
[2] Wadley et al., Science 351 (2016).
[3] Kasper et al., Nature Electronics 4 (2020).
[4] Krizek et al., Sci. Adv. 8 (2022).
[5] Zubáč et al., Phys. Rev. B 104 (2021).

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