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    Disorder dependent half-metallicity in Mn2CoSi inverse Heusler alloy

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    Disorder dependent half-metallicity in Mn2CoSi inverse Heusler alloy-abstract.pdf (58.80Kb)
    Date
    2013
    Author
    Singh, Mukhtiyar P.
    Saini, Hardev S.
    Thakur, Jyoti
    Ali Hussain, Reshak, Prof. Dr.
    Kashyap, Manish K.
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    Abstract
    Heusler alloys based thin-films often exhibit a degree of atomic disorder which leads to the lowering of spin polarization in spintronic devices. We present ab-initio calculations of atomic disorder effects on spin polarization and half-metallicity of Mn2CoSi inverse Heusler alloy. The five types of disorder in Mn2CoSi have been proposed and investigated in detail. The A2a-type and B2-type disorders destroy the half-metallicity whereas it sustains for all disorders concentrations in DO3a- and A2b-type disorder and for smallest disorder concentration studied in DO3b-type disorder. Lower formation energy/atom for A2b-type disorder than other four disorders in Mn2CoSi advocates the stability of this disorder. The total magnetic moment shows a strong dependence on the disorder and the change in chemical environment. The 100% spin polarization even in the presence of disorders explicitly supports that these disorders shall not hinder the use of Mn2CoSi inverse Heusler alloy in device applications.
    URI
    http://www.sciencedirect.com/science/article/pii/S0022459613004568
    http://dspace.unimap.edu.my:80/dspace/handle/123456789/35869
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    • School of Materials Engineering (Articles) [553]
    • Center of Excellence for Geopolymer and Green Technology (CEGEOGTECH) (Articles) [130]

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