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Local magnetism, magnetic order and spin freezing in the "nonmetallic metal" FeCrAs

Huddart, Benjamin; Birch, Max T; Pratt, Francis; Blundell, Stephen; Porter, Dan G; Clark, Stewart J; Wu, Wenlong; Julian, Stephen R; Hatton, Peter; Lancaster, Tom

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Authors

Max T Birch

Francis Pratt

Stephen Blundell

Dan G Porter

Stewart J Clark

Wenlong Wu

Stephen R Julian

Peter Hatton



Abstract

We present the results of x-ray scattering and muon-spin relaxation (SR) measurements on the iron-pnictide compound FeCrAs. Polarized non-resonant magnetic x-ray scattering results reveal the 120° periodicity expected from the suggested three-fold symmetric, non-collinear antiferromagnetic structure. SR measurements indicate a magnetically ordered phase throughout the bulk of the material below K. There are signs of fluctuating magnetism in a narrow range of temperatures above involving low-energy excitations, while at temperatures well below behaviour characteristic of freezing of dynamics is observed, likely reflecting the effect of disorder in our polycrystalline sample. Using density functional theory we propose a distinct muon stopping site in this compound and assess the degree of distortion induced by the implanted muon.

Citation

Huddart, B., Birch, M. T., Pratt, F., Blundell, S., Porter, D. G., Clark, S. J., …Lancaster, T. (2019). Local magnetism, magnetic order and spin freezing in the "nonmetallic metal" FeCrAs. Journal of Physics: Condensed Matter, 31(28), Article 285803. https://doi.org/10.1088/1361-648x/ab151f

Journal Article Type Article
Acceptance Date Mar 26, 2019
Online Publication Date Apr 26, 2019
Publication Date Jul 17, 2019
Deposit Date Apr 15, 2019
Publicly Available Date Mar 29, 2024
Journal Journal of Physics: Condensed Matter
Print ISSN 0953-8984
Electronic ISSN 1361-648X
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 31
Issue 28
Article Number 285803
DOI https://doi.org/10.1088/1361-648x/ab151f
Related Public URLs https://arxiv.org/abs/1812.09252

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