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- W2090972601 abstract "We have studied the influence of the mean CeO distance on the Ce L3 X-ray absorption spectra (XAS), for a given eight-fold oxygen coordination, like in CeO2 (cubic symmetry). For that purpose, solid solutions of cerium-doped Y2O3 (2 at% and 5 at%) were synthesised. The local atomic arrangement in the solid solutions, as deduced from the EXAFS (Extended X-ray Absorption Fine Structures) measurements, is well represented by a 8-fold oxygen coordination around the cerium atoms like in CeO2, with a CeO distance of 2.28Åas in Y2O3, shorter than in CeO2 (2.34Å). This shortening of the CeO distance increases the Madelung field acting on the electrons of the cerium atoms, and leads to an increase of the charge transfer energy between cerium and oxygen. This affects the shape of the Ce L3 X-ray absorption spectrum of the solid solutions, compared to that of CeO2. The changes observed can be explained in the framework of the multielectronic configuration-mixing model." @default.
- W2090972601 created "2016-06-24" @default.
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- W2090972601 date "1995-05-01" @default.
- W2090972601 modified "2023-10-18" @default.
- W2090972601 title "Influence of the cerium — oxygen charge transfer energy on the cerium excitation spectra of oxides. A Ce L3 XAS study of cerium doped yttrium oxide" @default.
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- W2090972601 doi "https://doi.org/10.1016/0168-583x(94)00741-1" @default.
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