CeO2-Gd2O3 system: Unraveling of microscopic features by Raman spectroscopy

被引：71

作者：

Banerji, Ankita ^{[2
]}

Grover, Vinita ^{[1
]}

Sathe, Vasant ^{[3
]}

Deb, S. K. ^{[2
]}

Tyagi, A. K. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Div Chem, Bombay 400085, Maharashtra, India

[2] Bhabha Atom Res Ctr, High Pressure Phys Div, Bombay 400085, Maharashtra, India

[3] UGC DAE CSR, Indore 452017, Madhya Pradesh, India

来源：

SOLID STATE COMMUNICATIONS | 2009年 / 149卷 / 39-40期

关键词：

Gadolinia; Ceria; Solid solution; Raman spectroscopy; RARE-EARTH-OXIDE; SPECTRA; GD;

D O I：

10.1016/j.ssc.2009.06.045

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Raman spectroscopic studies were carried out on a complete range of ceria-gadolinia solid solutions (Ce1-xGdxO2-x/2) to determine the intricate microscopic changes that occur in the system. The system is characterized by the presence of an F-type Raman mode until x <= 0.2, the co-existence of Raman modes of both F-type and C-type in the range (0.3 <= x <= 0.8) and mostly C-type Raman mode for x >= 0.8. Several broad modes indicating a high degree of disorder in the F-type lattice could also be observed. As the system (Ce1-xGdxO2-x/2) moves from x = 0.0 to x = 1.0, the average co-ordination number changes from 8 to 6 which brings about interesting changes at the microscopic level. These changes are readily exhibited by the variation in Raman spectra of various consecutive nominal compositions. This investigation establishes the utility of Raman spectroscopy in convincingly ascertaining the existence of C-type domains in an F-type matrix and vice-versa. (c) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1689 / 1692

页数：4

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