Structural evidence for the nonmonotonic trend of TC in tetragonal PbTiO3-BiScO3 solid solutions

被引：20

作者：

Chen, Jun ^{[1
]}

Nittala, Krishna ^{[2
]}

Jones, Jacob L. ^{[2
]}

Hu, Penghao ^{[1
]}

Xing, Xianran ^{[1
,3
]}

机构：

[1] Univ Sci & Technol Beijing, Dept Phys Chem, Beijing 100083, Peoples R China

[2] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

[3] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 25期

基金：

中国国家自然科学基金;

关键词：

bismuth compounds; dielectric polarisation; lead compounds; neutron diffraction; piezoelectric materials; solid solutions; solid-state phase transformations; POWDER DIFFRACTION; TEMPERATURE; SYSTEM;

D O I：

10.1063/1.3456389

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High-T-C piezoelectric (1-x)PbTiO3-xBiScO(3) shows a nonmonotonic trend of T-C in the tetragonal phase with respect to content of BiScO3. To understand this behavior, the structure of (1-x)PbTiO3-xBiScO(3) solid solutions is studied by means of neutron powder diffraction. The cation displacements of Pb/Bi and Ti/Sc exhibit a coupling property and a different impact by the substitution content of BiScO3. Its nonmonotonic trend of T-C is quantitatively related to the calculated spontaneous polarization in the whole tetragonal range. The unique role of Bi-substitution not only contributes to enhance the component of polarization of Pb/Bi but also to increase the T-C. (C) 2010 American Institute of Physics. [doi:10.1063/1.3456389]

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