Abstract
O K-edge absorption studies of Ce-doped using both total electron yield and fluorescence emission show similar features to undoped . This is in contrast to that observed for Sr-doped and . In addition, M-edge absorption spectra of Ce and Nd show that Ce ions are in an intermediate valence state and Nd remains in the trivalent state. Results are presented and discussed along with those of other Cu oxide superconductors.
- Received 29 December 1989
DOI:https://doi.org/10.1103/PhysRevB.42.4763
©1990 American Physical Society