Investigating the local structure of B-site cations in (1-x)BaTiO3-exBiScO3 and (1-x)PbTiO3-xBiScO3 using X-ray absorption spectroscopy

被引：6

作者：

Blanchard, Peter E. R. ^{[1
]}

Grosvenor, Andrew P. ^{[2
]}

机构：

[1] Canadian Light Source, Saskatoon, SK S7N 2V3, Canada

[2] Univ Saskatchewan, Dept Chem, Saskatoon, SK S7N 5C9, Canada

来源：

SOLID STATE SCIENCES | 2018年 / 79卷

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会; 加拿大健康研究院;

关键词：

Perovskites; Ferroelectrics; Scandium; XANES; MORPHOTROPIC PHASE-BOUNDARY; HIGH-TEMPERATURE; K-EDGE; FERROELECTRIC PROPERTIES; ELECTRONIC-STRUCTURE; SPECTRA; XANES; BEHAVIOR; ORIGIN; COORDINATION;

D O I：

10.1016/j.solidstatesciences.2018.02.018

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The structural properties of (1-x)BaTiO3-xBiScO(3) and (1-x)PbTiO3-xBiScO(3) were investigated using powder X-ray diffraction and X-ray absorption spectroscopy. Diffraction measurements confirmed that substituting small amounts of BiScO3 into BaTiO3 initially stabilizes a cubic phase at x = 0.2 before impurity phases begin to form at x = 0.5. BiScO3 substitution also resulted in noticeable changes in the local coordination environment of Ti4+. X-ray absorption near-edge spectroscopy (XANES) analysis showed that replacing Ti4+ with Sc3+ results in an increase in the off-centre displacement of Ti4+ cations. Surprisingly, BiScO3 substitution has no effect on the displacement of the Ti4+ cation in the (1-x)PbTiO3-xBiScO(3) solid solution. (C) 2018 Elsevier Masson SAS. All rights reserved.

引用

页码：6 / 14

页数：9

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