Document Type

Article

Publication Date

3-3-2005

Journal or Book Title

Journal of Materials Research

Volume

20

Issue

7

First Page

1641

Last Page

1653

DOI

10.1557/JMR.2005.0213

Abstract

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(Mg1/3Nb2/3)O3–PbTiO3 single crystal, and the transformation of incommensurate modulations in Pb0.99Nb0.02[(Zr1−xSnx)1−yTiy]0.98O3 (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° domain wall, indicating the presence of severe incompatible piezoelectric strains at thedomain wall. In the antiferroelectric PZST ceramics, the electric field-induced antiferroelectric-to-ferroelectric phase transformation was accompanied with the disappearance of incommensurate modulations.

Comments

This article is from Journal of Materials Research 20 (2005): 1641–1653, doi:10.1557/JMR.2005.0213. Posted with permission.

Copyright Owner

Materials Research Society

Language

en

File Format

application/pdf

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