Enhanced piezoelectric properties of barium titanate single crystals with different engineered-domain sizes

Satoshi Wada, Koichi Yako, Hirofumi Kakemoto, Takaaki Tsurumi, Takanori Kiguchi

Research output: Contribution to journalArticlepeer-review

271 Citations (Scopus)

Abstract

For tetragonal barium titanate (BaTiO3) single crystals, an electric field (E-field) applied along the [111]c direction can induce an engineered-domain configuration in these crystals. In this study, such engineered-domain configurations of different domain sizes were induced in BaTiO3 single crystals, and their piezoelectric properties were investigated as a function of domain size. Prior to this study, the dependences of the domain configuration on the temperature and E-field were investigated using a polarizing microscope in order to understand the optimum poling condition for fine- and coarse-domain configurations. We found that above the Curie temperature (TC) of 132.2 °C, when an E-field above 6.0 kVcm was applied along the [111]c direction, an engineered domain with a fine-domain configuration appeared. Moreover, it was also found that this fine-domain configuration remained stable at room temperature without the E-field. On the other hand, the coarse-domain configuration was obtained upon poling at just below TC. Finally, the piezoelectric properties of 31 resonators with different domain sizes of 40-5.5 μm were measured. As a result, it was found that the piezoelectric properties, such as d31 and k31, increased significantly with decreasing domain size.

Original languageEnglish
Article number014109
JournalJournal of Applied Physics
Volume98
Issue number1
DOIs
Publication statusPublished - 2005 Jul 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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