  Ba2CoWO6 (BCoW) has been synthesized in polycrystalline form by solid state
reaction at 1200C. Structural characterization of the compound was done through
X-ray diffraction (XRD) followed by Rietveld analysis of the XRD pattern. The
crystal structure is cubic, space group Fm-3m (No 225) with the lattice
parameter, a=8.210A. Optical band-gap of the present system has been calculated
using the UV-Vis Spectroscopy and Kubelka-Munk function, its value being 2.45
eV. A detailed study of the electronic properties has also been carried out
using the density functional theory (DFT) techniques implemented on WIEN2k.
Importance of electron-electron interaction between the Co ions leading to
half-metallic behavior, crystal and exchange splitting together with the
hybridization between O and Co, W has been investigated using the total and
partial density of states.
