Structure and negative thermal expansion in the PbTiO3-BiFeO3 system

被引：108

作者：

Chen, J.

Xing, X. R. ^{[1
]}

Liu, G. R.

Li, J. H.

Liu, Y. T.

机构：

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

[2] China Inst Atom Energy, Beijing 102413, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 10期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2347279

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The structures of (1-x)PbTiO3-xBiFeO(3) (x=0.3 and 0.6) were investigated by means of the neutron powder diffraction. A splitting shift between Fe and Ti atoms was found along the c axis in 0.7PbTiO(3)-0.3BiFeO(3); however, this splitting does not appear in 0.4PbTiO(3)-0.6BiFeO(3). The tetragonal phase of PbTiO3-BiFeO3 exhibits a large spontaneous polarization. The negative thermal expansion of PbTiO3 is significantly enhanced in a wide temperature range by the BiFeO3 substitution. The average bulk thermal expansion coefficient of 0.4PbTiO(3)-0.6BiFeO(3) is < over bar > a </over bar >(v)=-3.92x10(-5) degrees C-1, which is much strong in the known negative thermal expansion oxides. (c) 2006 American Institute of Physics.

引用

页数：3

共 15 条

[1] Structure and enhancement of negative thermal expansion in the PbTiO3-CdTiO3 system -: art. no. 231915 [J].