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Crystal structure and X-ray photoelectron spectroscopy study of the transition-metal oxides LaFe_(1-x) Cr_xO_3

LaFe 1- x Cr x O 3 systematic compounds were prepared by Cr 3+ doping into the end component LaFeO 3. The crystal constants have been evaluated by using MarqX code. The analysis of the XRD data confirms that the perovskite compounds are in their single-phase state. We have also performed O 1s core-level photoemission experiments using photon energies above and below Fe 2p absorption edge, respectively, in order to investigate the crystal structure variation trend in terms of electronic structure. A preliminary conclusion has been drawn that the charge transfer amount from O 2p to Cr 3d varies regularly with the doping level of Cr 3+ in LaFe 1- x Cr x O 3.