Experimental and first-principles determination of the magnetocrystalline anisotropy in MnxGa

Xubo Liu; D. H. Ryan; Manli Wang; Qingmei Lu; Hongguo Zhang; Ming Yue; Z. Altounian

doi:10.1063/1.4974890

AIP Advances (May 2017)

Experimental and first-principles determination of the magnetocrystalline anisotropy in MnxGa

Xubo Liu,
D. H. Ryan,
Manli Wang,
Qingmei Lu,
Hongguo Zhang,
Ming Yue,
Z. Altounian

Affiliations

Xubo Liu: Physics Department and Centre for the Physics of Materials, McGill University, 3600 University Street, Montreal, Quebec H3A 2T8, Canada
D. H. Ryan: Physics Department and Centre for the Physics of Materials, McGill University, 3600 University Street, Montreal, Quebec H3A 2T8, Canada
Manli Wang: College of Materials Science and Engineering, Beijing University of Technology, Beijing 100122, China
Qingmei Lu: College of Materials Science and Engineering, Beijing University of Technology, Beijing 100122, China
Hongguo Zhang: College of Materials Science and Engineering, Beijing University of Technology, Beijing 100122, China
Ming Yue: College of Materials Science and Engineering, Beijing University of Technology, Beijing 100122, China
Z. Altounian: Physics Department and Centre for the Physics of Materials, McGill University, 3600 University Street, Montreal, Quebec H3A 2T8, Canada

DOI: https://doi.org/10.1063/1.4974890
Journal volume & issue: Vol. 7, no. 5
pp. 056216 – 056216-5

Abstract

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Singular point detection (SPD) for the determination of the anisotropy field (BA) using a conventional magnetometer is demonstrated. We then follow the composition dependence of BA in MnxGa using a combination of SPD measurements complemented by first-principles density functional theory (DFT) calculations. We find excellent quantitative agreement for 1.2≤x≤ 1.8, but observe a marked departure for x≤1.2. We suggest that the deviation from ideal behaviour might be associated with site disorder at low excess Mn.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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