High T C half-metallic fully-compensated ferrimagnetic Heusler compounds
2011; American Institute of Physics; Volume: 99; Issue: 5 Linguagem: Inglês
10.1063/1.3619844
ISSN1520-8842
Autores Tópico(s)Intermetallics and Advanced Alloy Properties
ResumoExtensive ab-initio electronic structure calculations on Heusler alloys suggest that Cr2CoGa is the alloy of choice to achieve the half-metallic fully-compensated ferrimagnetism since (1) it has been already grown experimentally [T. Graf et al., Z. Anorg. Allg. Chem. 635, 976 (2009)], (2) half-metallic XA structure is favored energetically over all the studied lattice constant range with respect to the L21 which is not half-metallic, (3) the half-metallic gap is wide and the Fermi level falls at the middle of the gap and thus, it presents high degree of spin-polarization for a wide range of lattice constants, and (4) the Curie temperature is extremely high reaching the 1520 K.
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