Abstract
We report x-ray-absorption and photoemission measurements on crystalline and amorphous ${\mathrm{Pd}}_{1\mathrm{\ensuremath{-}}\mathrm{x}}$${\mathrm{Ce}}_{\mathrm{x}}$ alloys. In this system, cerium ions present a valence change induced by concentration and a correlation between the cerium electronic configuration and the density of occupied states. The centroid of the Pd 4d\char21{}related band moves away from the Fermi level with increasing cerium content, leading to a decrease in the mixing between 4f and conduction electrons and then to the stabilization of the cerium trivalent state. The effect of structural disorder on the cerium valence anomaly in amorphous alloys is also discussed.
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