Ce-valence-state variations in crystalline 3d and 4d transition metals (T) are reviewed. The breakdown of the typical crystalline Ce-valence-state behavior in a large new class of amorphous Ce-T films is pointed out. $L_{\mathrm{III}}$ x-ray-absorption measurements are used to estimate these Ce-valence-state effects. The potential role of the transition-metal electronic structure in the anomalous Ce-valence behavior in these amorphous films is discussed.

• Received 7 October 1985

DOI:https://doi.org/10.1103/PhysRevB.33.5950