title: Ce electronic states in Nd(0.45-x)Ce(x)Sr0.55MnO3 probed by x-ray absorption spectroscopy and photoemission.
abstract: We have investigated the Ce 4f electronic states in the Ce-doped manganites Nd(0.45-x)Ce(x)Sr0.55MnO3 (NCSMO) by means of x-ray absorption spectroscopy (XAS) and hard x-ray photoelectron spectroscopy (HAXPES). The Ce 3d XAS shows that the Ce ions exist in the form of the Ce(3+) and Ce(4+) mixed-valent states, and we have found that the XAS spectral features change with temperature. The Ce 3d XAS and HAXPES spectra for NCSMO agree reasonably well with calculated results based on the single-impurity Anderson model, which takes into account the atomic multiplets and two valence bands. The estimated Ce bulk valence of Nd0.15Ce0.3Sr0.55MnO3 decreases from 3.44 to 3.30 with cooling.
authors.affiliation: Department of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Shirai
authors.forename: S
authors.initials: S
authors.lastname: Imada
authors.forename: A
authors.initials: A
authors.lastname: Higashiya
authors.forename: A
authors.initials: A
authors.lastname: Sekiyama
authors.forename: S
authors.initials: S
authors.lastname: Suga
authors.forename: T
authors.initials: T
authors.lastname: Muro
authors.forename: Y
authors.initials: Y
authors.lastname: Tanaka
authors.forename: K
authors.initials: K
authors.lastname: Tamasaku
authors.forename: M
authors.initials: M
authors.lastname: Yabashi
authors.forename: T
authors.initials: T
authors.lastname: Ishikawa
authors.forename: S
authors.initials: S
authors.lastname: Miyasaka
authors.forename: Y
authors.initials: Y
authors.lastname: Tokura
mesh_terms: D002586:Cesium / Q000737:chemistry*; D003198:Computer Simulation; D004553:Electric Conductivity; D008422:Materials Testing; D008956:Models, Chemical; D008958:Models, Molecular; D056951:Photoelectron Spectroscopy; D056928:X-Ray Absorption Spectroscopy
chemical_list: D002586:Cesium