Document Type

Article

Publication Date

2014

Journal or Book Title

Physical Review B

Volume

89

First Page

100104-1

Last Page

100104-4

DOI

10.1103/PhysRevB.89.100104

Abstract

Non-180° ferroelectric domains are also ferroelastic domains; their existence in polycrystalline materials is to relieve internal stresses generated during solid-solid phase transitions and minimize the elastic distortion energy. Therefore, grains with random orientations in polycrystalline ceramics are always occupied by many domains, especially in the regions close to grain boundaries. In this Rapid Communication, we report the observation of a single-domain state in a BaTiO3-based polycrystalline ceramic at intermediate poling electric fields with in situ transmission electron microscopy. The grains in the virgin ceramic and under high poling fields are found multidomained. The unique single-domain state is believed to be responsible for the ultrahigh piezoelectric property observed in this lead-free composition and is suggested to be of orthorhombic symmetry for its exceptionally low elastic modulus.

Comments

This article is from Physical Review B 89 (2014): 100104(R), doi: 10.1103/PhysRevB.89.100104.Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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