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    • Keywords


      Photoelectron spectroscopy; ESCA; x-ray (K, LIII) absorption spectra; transition metal oxides; perovskites

    • Abstract


      X-ray and ultraviolet photoelectron spectroscopy as well as x-ray absorption spectroscopy have been employed to investigate transition metal oxide perovskites of the general formula ABO3 (A = La or rare-earth ion, B=trivalent transition metal ion). Systematics in the core levels and in the valence bands in the series of LaBO3 compounds have been discussed. Lanthanum chemical shifts in the x-ray absorption spectra in this series show interesting trends. Photoelectron spectra of the solid solutions, LaNi1−xCoxO3, LaNi1−xFexO3 and LaFe1−xCoxO3 show that the rigid band model is applicable to these systems. It is shown that x-ray photoelectron spectroscopy can be employed to identify multiple oxidation states of transition metal ions in oxide perovskites.

    • Author Affiliations


      W H Madhusudan1 Sheelavathi Kollali1 P R Sarode1 M S Hegde1 P Ganguly1 C N R Rao1

      1. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore - 560 012
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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