LOCAL STRUCTURES IN THE SUPERIONIC CONDUCTOR Y3+-DOPED CEO2 STUDIED USING SITE-SELECTIVE SPECTROSCOPY

被引：17

作者：

YUGAMI, H ^{[1
]}

NAKAJIMA, A ^{[1
]}

ISHIGAME, M ^{[1
]}

SUEMOTO, T ^{[1
]}

机构：

[1] UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.44.4862

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 system.

引用

页码：4862 / 4871

页数：10

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