B-site vacancy as the origin of spontaneous normal-to-relaxor ferroelectric transitions in La-modified PbTiO3

被引：86

作者：

Kim, TY

Jang, HM ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Mat Sci & Engn, Pohang 790784, South Korea

[2] Pohang Univ Sci & Technol, Natl Res Lab Ferroelect Phase Transit, Pohang 790784, South Korea

来源：

APPLIED PHYSICS LETTERS | 2000年 / 77卷 / 23期

关键词：

D O I：

10.1063/1.1330218

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The site vacancy responsible for the manifestation of a spontaneous normal-to-relaxor transition was investigated using La-modified PbTiO3 as a model perovskite system. The two cation-site defects relevant to the present study are the A-site (Pb site) and B-site (Ti site) vacancies. To clearly elucidate the type of vacancy involved in the spontaneous transition, we have developed a sintering route that suitably adjusts the relative concentration of these two distinct cation-site vacancies. Using this processing scheme, we have shown that the microcompositional inhomogeneity caused by the B-site vacancy is primarily responsible for the manifestation of relaxor behavior from normal ferroelectricity in La-modified PbTiO3. (C) 2000 American Institute of Physics. [S0003- 6951(00)03049-7].

引用

页码：3824 / 3826

页数：3

共 27 条

[1] Structural origin of relaxer ferroelectrics - revisited [J].