In situ transmission electron microscopy studies of electric-field-induced phenomena in ferroelectrics

被引：51
|
作者：
Tan, XL [1 ]
He, H
Shang, JK
机构：
[1] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA
[2] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA
来源：
JOURNAL OF MATERIALS RESEARCH | 2005年 / 20卷 / 07期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1557/JMR.2005.0213
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
High electric fields were delivered to specimens during imaging in the transmission electron microscopy (TEM) chamber to reveal details of electric field-induced phenomena in ferroelectric oxides. These include the polarization switching in nanometer-sized ferroelectric domains and the grain boundary cavitation in a commercial lead zirconate titanate (PZT) polycrystalline ceramic, the domain wall fracture in a Pb(Mg(1/3)Nb(2/3))O(3)-PbTiO(3) single crystal, and the transformation of incommensurate modulations in Pb(0.99)Nb(0.02)[(Zr(1-x)Sn(x))(1-y)Ti(y)](0.98)O(3) (PZST100x/ 100y/2) polycrystalline ceramics. In the PZT ceramic, a cavitation process was uncovered for the electric field-induced intergranular fracture. In the ferroelectric single crystal, a preexisting crack was observed to deflect and to follow a 90 degrees domain wall, indicating the presence of severe incompatible piezoelectric strains at the, domain wall. In the antiferroelectric PZST ceramics, the electric field-induced antiferroelectric-to-ferroelectric phase transformation was accompanied with the disappearance of incommensurate modulations.
引用
收藏
页码：1641 / 1653
页数：13
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