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27 April 2024 |
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Electrical transport properties of bulk tetragonal CuMnAs | | J Volny
; D. Wagenknecht
; J Zelezny
; P Harcuba
; E Duverger-Nedellec
; R H Colman
; J Kudrnovsky
; I Turek
; K Uhlirova
; K Vyborny
; | | Date: |
7 Jan 2020 | | Abstract: | Temperature-dependent resistivity and magnetoresistance are measured in bulk
tetragonal phase of antiferromagnetic CuMnAs and the latter is found to be
anisotropic both due to structure and magnetic order. We compare these findings
to model calculations with chemical disorder and finite-temperature phenomena
included. The finite-temperature ab initio calculations are based on the alloy
analogy model implemented within the coherent potential approximation and the
results are in fair agreement with experimental data. Regarding the anisotropic
magnetoresistance (AMR) which reaches a modest magnitude of 0.12%, we
phenomenologically employ the Stoner-Wohlfarth model to identify
temperature-dependent magnetic anisotropy of our samples and conclude that the
field-dependence of AMR is more similar to that of antiferromagnets than
ferromagnets, suggesting that the origin of AMR is not related to isolated Mn
magnetic moments. | | Source: | arXiv, 2001.1947 | | Services: | Forum | Review | PDF | Favorites | |
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