Designing a fully compensated half-metallic ferrimagnet
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2016Access:
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Å¿ic 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, Archer T, Designing a fully compensated half-metallic ferrimagnet, Physical Review B - Condensed Matter and Materials Physics, 93, 14, 2016, 140202Download Item:
PhysRevB.93.140202.pdf (PDF) 639.1Kb
Abstract:
Recent experimental work on Mn
2
Ru
x
Ga 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 a detailed
experimental characterization that enable us to correctly describe the nominal Mn
2
Ru
x
Ga 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 necessary, 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.
Sponsor
Grant Number
Science Foundation Ireland (SFI)
13/ERC/12561
Author's Homepage:
http://people.tcd.ie/sanvitoshttp://people.tcd.ie/jcoey
http://people.tcd.ie/rodek
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Physical Review B - Condensed Matter and Materials Physics93
14
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Full text availableKeywords:
Ga thin filmsDOI:
http://dx.doi.org/10.1103/PhysRevB.93.140202Licences: