Structural, electronic and magnetic properties of CoFeTiGa1−xSbx compounds

Structural, electronic and magnetic properties of Heusler compounds CoFeTiGa1−xSbx have been studied. X-ray diffraction patterns show that CoFeTiGa1−xSbx (x=0.25, 0.5, 0.75, 1) crystallize into LiMgPdSn-type structure. First-principles calculations indicate that CoFeTiGa1−xSbx (x=0.25, 0.5, 0.75, 1) are half-metal with considerable minority band gaps. The substitution of Sb for Ga gives rise to the spin moments of the compounds, and makes them to be half-metallic ferrimagnets.