Local magnetism, magnetic order and spin freezing in the 'nonmetallic metal' FeCrAs [dataset]

Porter, D G (Diamond Light Source, UK); Pratt, F L (STFC-ISIS Facility, UK); Huddart, B M (Durham University, UK); Birch, M T (Durham University, UK); Clark, S J (Durham University, UK); Hatton, P D (Durham University, UK); Lancaster, T (Durham University, UK); Julian, S R (University of Toronto, Canada); Blundell, S J (University of Oxford, UK); Wu, W (University of Toronto, Canada)

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Local magnetism, magnetic order and spin freezing in the 'nonmetallic metal' FeCrAs [dataset] Open Access

We present the results of x-ray scattering and muon-spin relaxation (μ+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, noncollinear antiferromagnetic structure. μ+SR measurements indicate a magnetically ordered phase throughout the bulk of the material below TN = 105(5) K. There are signs of fluctuating magnetism in a narrow range of temperatures above TN involving low-energy excitations, while at temperatures well below TN 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.

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Resource type: Dataset
Contributors: Creator: Lancaster, T ¹
Creator: Huddart, B M ¹
Creator: Birch, M T ¹
Creator: Pratt, F L ²
Creator: Porter, D G ³
Creator: Clark, S J ¹
Creator: Julian, S R ⁴
Creator: Hatton, P D ¹
Creator: Blundell, S J ⁵
Creator: Wu, W ⁴

¹ Durham University, UK
² STFC-ISIS Facility, UK
³ Diamond Light Source, UK
⁴ University of Toronto, Canada
⁵ University of Oxford, UK
Funder: Engineering and Physical Sciences Research Council
Science and Technology Facilities Council
Natural Sciences and Engineering Research Council of Canada
Research methods
Other description
Keyword: muon-spin relaxation
non-Fermi liquid
density functional theory
non-collinear magnetic order
magnetic x-ray scattering
Subject
Location
Language
Cited in: arxiv:1812.09252
10.1088/1361-648X/ab151f
Identifier: ark:/32150/r2qb98mf48k
doi:10.15128/r2qb98mf48k
Rights: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC)
Publisher: Durham University
Date Created

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Depositor: T. Lancaster
Date Uploaded: 27 March 2019, 11:03:45
Date Modified: 12 April 2019, 11:04:16
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Characterization: File format: zip (ZIP Format)

Mime type: application/zip

File size: 62203

Last modified: 2019:04:12 10:19:49+01:00

Filename: FeCrAs data.zip

Original checksum: 3df09bf1dadee1a15d3836dee94285d7

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