Local structures in the superionic conductor Y3+-doped CeO2 studied using site-selective spectroscopy

H. Yugami, A. Nakajima, M. Ishigame, T. Suemoto

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Luminescence spectra of Eu3+ ions in Y3+-doped CeO2 crystals are measured as a function of excitation wavelength for samples of various Y3+ concentrations. Eu3+ ions, which partially substitute for Y3+ ions, act as a structural probe. It is found that six different sites of Eu3+ ions exist in this material. A local-structure model is proposed for these sites and experimental results are well explained with this model. The dopant-concentration dependence of the luminescence spectra reveals that the defect center of the oxygen vacancy associated with one Y3+ ion is closely related to the ionic conducting mechanism in this sytem.

Original languageEnglish
Pages (from-to)4862-4871
Number of pages10
JournalPhysical Review B
Volume44
Issue number10
DOIs
Publication statusPublished - 1991 Jan 1

ASJC Scopus subject areas

  • Condensed Matter Physics

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