Optical absorption in intermetallic compounds CoxGa100-x (x=47-62 at.% Co) with crystal structure CsCl has been studied in the spectral range E=1-10 eV. The electronic structures of ordered equiatomic CoGa and of an antistructural cobalt atom in the gallium sublattice are calculated using the Green's functions method in the linearized muffin-tin orbitals approximation. The appearance of a peak in the density of states near the Fermi level as a result of allowing for structural defects provides a qualitative explanation for the additional optical absorption at E>0.8 eV compared with the case of a perfect crystal.
|Number of pages||5|
|Journal||Physics of Metals and Metallography|
|Publication status||Published - 1989|