Structural Disorder, Polarisation and the Normal to Relaxor Ferroelectric Transition in BaTiO3 Based Perovskites

被引：7

作者：

Liu, Y. ^{[1
]}

Withers, R. L. ^{[1
]}

机构：

[1] Australian Natl Univ, Res Sch Chem, Canberra, ACT 0200, Australia

来源：

FERROELECTRICS | 2010年 / 402卷

基金：

澳大利亚研究理事会;

关键词：

ferroelectric; relaxor ferroelectric; BaTiO3; electron diffraction; polar nano regions; DIFFUSE-SCATTERING; PHASE-TRANSITION; CHAIN STRUCTURE; BEHAVIOR;

D O I：

10.1080/00150191003697039

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper uses structured diffuse scattering to compare and contrast the local crystal structure behaviour of the normal ferroelectric BaTiO3 with a range of relaxor ferroelectric substituted BaTiO3 materials. The results strongly suggest that both normal ferroelectric BaTiO3 and the relaxor ferroelectric substituted BaTiO3's have the same underlying polarisation mechanism i.e. inherent 1-D correlated Ti cation and neighbouring O anion displacements forming 1-D dipole clusters (or polar nano regions). The role of the substituting ions is not to induce the PNR's but rather to suppress homogeneous strain distortion, transverse correlation of the 1-D PNR's and a transition into a long range ordered ferroelctric state.

引用

页码：3 / 9

页数：6

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