Cation disorder in the ferroelectric oxides ABi2Ta2O9, A = Ca, Sr, Ba

被引：58

作者：

Macquart, R

Kennedy, BJ ^{[1
]}

Shimakawa, Y

机构：

[1] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia

[2] NEC Corp Ltd, Fundamental Res Labs, Tsukuba, Ibaraki 3058501, Japan

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2001年 / 160卷 / 01期

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1006/jssc.2001.9216

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The crystal structures of the layered ferroelectric oxides ABi(2)Ta(2)O(9) (A = Ca, Sr, and Ba) have been refined using multiple-wavelength synchrotron powder diffraction data. At room temperature CaBi2Ta2O9 and SrBi2Ta2O9 have an orthorhombic structure with space group A2(1)am. Bulk samples of the two oxides exhibit small, but significant amounts of disorder between the A-type and Bi atoms. BaBi2TaO9 has a tetragonal structure, space group I4/mmm. Again significant amounts of cation disorder are detected. (C) 2001 Academic Press.

引用

页码：174 / 177

页数：4

共 21 条

[1]

AURIVILLIUS B, 1950, ARK KEMI, V1, P463

[2] Cation disorder in ferroelectric Aurivillius phases of the type Bi(2)ANb(2)O(9) (A=Ba, Sr, Ca) [J].