Abstract
High energy resolution fluorescence detected XANES and the core-level X-ray electron photoemission spectra of lead and iron substituted manganese perovskites La 0.67(Ca,Pb) 0.33(Mn 1− x Fe x )O 3 with x=0, 0.01, 0.03, 0.06, 0.10 and 0.15 were measured and analyzed. The evolution of the average valence of manganese ions was derived from the energy shift of the Mn K-edge as a function of iron content, which changes by ∼0.25 eV from x=0.0 to x=0.15. This agrees well with the expected average valence evolution from Mn 3.33+ to Mn 3.38+. The relative ratio of Mn 3+/Mn 4+ was calculated as a function of x by means of multiplet analysis of the Mn 2 p 3/2 photoemission lines. They are in fairly good agreement with the expected values.
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