title: X-ray absorption spectroscopy studies of Ba(1-x)Ca(x)TiO3.
abstract: We report x-ray absorption near edge spectroscopy (XANES) of Ca and O K-edges of Ba(1-x)Ca(x)TiO3 (x = 0, 0.01, 0.08, 1) and understand the spectral features related to the electronic structure of these perovskites. The XANES spectra of Ca K-edge possess a pre-edge peak similar to other 3d transition metals like Ti, Ni when present in perovskite structure and provides information about p-type or hole doping. Presence of considerable amount of 3d states 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 t2g and show strong dependence on concentration.
authors.affiliation: Department of Physics, Tamkang University, Tamsui, Taiwan. asokan@polaron.phys.tku.edu.tw
authors.forename: K
authors.initials: K
authors.lastname: Asokan
authors.forename: J C
authors.initials: JC
authors.lastname: Jan
authors.forename: J W
authors.initials: JW
authors.lastname: Chiou
authors.forename: W F
authors.initials: WF
authors.lastname: Pong
authors.forename: P K
authors.initials: PK
authors.lastname: Tseng
authors.forename: I N
authors.initials: IN
authors.lastname: Lin