Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 360, Issue -, Pages 98-103Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2014.02.050
Keywords
Half -metallic; Heusler alloy; First-principles calculation
Funding
- National Natural Science Foundation of China [11004066]
- Fundamental Research Funds for the Central Universities [HUST:2013QN014]
- Natural Science Foundation of Hubei province [2013CFC013]
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We investigate the electronic structure and magnetic properties of the twelve quaternary Hoosier alloys CoFeTiZ and CoFeVZ (Z=AI, Ga, Si, Ge, As, Sb) by using the first-principles calculations. It is shown that only CoFeTiSi, CoFeTiAs and CoFeVSb are half-metallic ferromagnets with considerable half-metallic gaps of 0.31, 0.18 and 0.17 eV, respectively. CoFeTiAl and CoFeTiGa are conventional semiconductors, and other alloys exhibit nearly hall-metallicity or their half-metallic gaps are almost zero eV. We also find that the hall-metallicities of CoFeTiSi, CoFeTiAs and CoFeVSb can be preserved under appropriate uniform and in-plane strains. The considerable half-metallic gaps and the robust hall-metallicities under uniform and in-plane strains make CoFeTiSi, CoFeTiAs and CoFeVSb promising candidates for spintronic applications. (C) 2014 Elsevier B.V. All rights reserved
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