Domain Wall Engineering in Barium Titanate Single Crystals for Enhanced Piezoelectric Properties

For the [111] poled barium titanate (BaTiO 3 ) single crystals with the engineered domain configuration, it was clearly observed that the piezoelectric properties increased with decreasing domain sizes. To explain the phenomenon, the multidomain single crystals were regarded as the composite of (a)...

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Bibliographic Details
Published in:Ferroelectrics 2006-06, Vol.334 (1), p.17-27
Main Authors: Wada, S., Yako, K., Yokoo, K., Kakemoto, H., Tsurumi, T.
Format: Article
Language:English
Subjects:
Barium titanate
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Dielectrics, piezoelectrics, and ferroelectrics and their properties
domain wall engineering
engineered domain configuration
Exact sciences and technology
Physics
piezoelectric property
Piezoelectricity and electromechanical effects
single crystal
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Summary:For the [111] poled barium titanate (BaTiO 3 ) single crystals with the engineered domain configuration, it was clearly observed that the piezoelectric properties increased with decreasing domain sizes. To explain the phenomenon, the multidomain single crystals were regarded as the composite of (a) a distorted domain wall region and (b) a normal tetragonal domain region. Using a 2-phases model, the piezoelectric properties from the domain wall were estimated. As a result, ultrahigh piezoelectric constants over 8,000 pC/N were expected from the domain wall region. Moreover, this study suggested that it is possible to obtain the lead-free piezoelectric materials with the d 31 and d 33 over 1,000 pC/N, when the domain sizes can decrease below 1 μ m.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150190600689647