Designing a fully compensated half-metallic ferrimagnet

Zic, M. et al. (2016) Designing a fully compensated half-metallic ferrimagnet. Physical Review B, 93(14), 140202. (doi:10.1103/PhysRevB.93.140202)

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Abstract

Recent experimental work on Mn2RuxGa demonstrates its potential as a compensated ferrimagnetic half-metal (CFHM). Here we present a set of high-throughput ab initio density functional theory calculations and detailed experimental characterisation, that enable us to correctly describe the nominal Mn2RuxGa thin films, in particular with regard to site-disorder and defects. We then construct models that accurately capture all the key features of the Mn-Ru-Ga system, including magnetic compensation and the spin gap at the Fermi level. We find that electronic doping is neccessary, which is achieved with a Mn/Ga ratio smaller than two. Our study shows how composition and substrate-induced biaxial strain can be combined to design a ferrimagnetic half-metal with a compensation point close to room temperature.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:MacLaren, Dr Donald and O'Shea, Miss Kerry and Ferguson, Mr Ciaran
Authors: Zic, M., Rode, K., Thiyagarajah, N., Lau, Y.-C., Betto, D., Coey, J. M. D., Sanvito, S., O'Shea, K. J., Ferguson, C. A., MacLaren, D. A., and Archer, T.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review B
Publisher:American Physical Society
ISSN:1098-0121
ISSN (Online):1550-235X
Copyright Holders:Copyright © 2016 American Physical Society
First Published:First published in Physical Review B 93(14):140202
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
530721Integrating advanced nanomaterials into transformative technologiesDonald MaclarenEngineering & Physical Sciences Research Council (EPSRC)EP/I00419X/1P&A - PHYSICS & ASTRONOMY