STRUCTURE-PROPERTY RELATIONSHIPS IN STRONTIUM BARIUM NIOBATE .1. NEEDLE-LIKE NANOPOLAR DOMAINS AND THE METASTABLY-LOCKED INCOMMENSURATE STRUCTURE

被引：49

作者：

VIEHLAND, D ^{[1
]}

XU, Z ^{[1
]}

HUANG, WH ^{[1
]}

机构：

[1] UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801

来源：

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES | 1995年 / 71卷 / 02期

关键词：

D O I：

10.1080/01418619508244351

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Transmission electron microscopy investigations have been performed on Sr2Ba1-xNb2O6 (SBN (x)(1 - x)). Bright-field imaging of (100)-oriented SBN 60/40 and 75/25 crystals revealed nanopolar domains with a strong shape anisotropy. The morphology of the nanopolar domains was needle like. Selected area electron diffraction (SAED) patterns revealed the existence of 1/x[110] incommensurate modulations. Dark-field imaging of the incommensurate reflections found the existence of nanometre-sized ferroelastic domains. Diffuse scattering was observed in the SAED patterns along the (100) direction. This diffuse scattering is believed to arise due to strain gradient interactions between the A-site cation distribution and the incommensuration.

引用

页码：205 / 217

页数：13

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