Short-range disorder in lanthanum-doped lead titanate ceramics probed by Raman scattering

被引：45

作者：

Tavares, ECS ^{[1
]}

Pizani, PS ^{[1
]}

Eiras, JA ^{[1
]}

机构：

[1] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP, Brazil

来源：

APPLIED PHYSICS LETTERS | 1998年 / 72卷 / 08期

关键词：

D O I：

10.1063/1.120929

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Raman scattering has been used to probe short-range structural information on lanthanum-doped lead titanate ceramics (LaxPb1-xTiO3) for x, ranging from 0.0 to 0.30. In highly doped samples (x > 0.27), x-ray diffraction measurements indicate a cubic structure, although measurements of Raman scattering at temperatures above and below the tetragonal to cubic transition showed a residual short-range structural disorder in the cubic phase. Moreover, for these highly lanthanum-doped samples, a well-defined temperature-induced ferro-paraelectric phase transition disappears, which suggests a relationship between local disorder and relaxer behavior in this material. (C) 1998 American Institute of Physics.

引用

页码：897 / 899

页数：3

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