X-ray absorption spectroscopy studies of Ba1-xCaxTiO3

We report x-ray absorption near edge spectroscopy (XANES) of Ca and O K-edg es of Ba1-xCaxTiO3 (x = 0, 0.01, 0.08, 1) and understand the spectral featu res related to the electronic structure of these perovskites. The XANES spe ctra of Ca K-edge possess a pre-edge peak similar to other 3d transition me tals like Ti, Ni when present in perovskite structure and provides informat ion about p-type or hole doping. Presence of considerable amount of 3d stat es justifies the reason to consider it as a light 3d transition metal. The O K-edge spectra display characteristic spectral features assigned as e(g) and t(2g) and show strong dependence on concentration.