Domain size dependence of d33 piezoelectric properties for barium titanate single crystals with engineered domain configurations

Abstract

Engineered domain configuration was induced into barium titanate (BaTiO 3) single crystals, and the d 33 piezoelectricity was investigated as a function of domain size. First, for the BaTiO 3 single-domain crystals, piezoelectric constant d 33 along [1 1 1] c direction was calculated as 224 pC/N. Prior to the domain engineering, the dependence of domain configuration on the temperature and the electric-field was investigated, and above Curie temperature ( T c), when the electric-field over 6 kV/cm was applied along [1 1 1] c direction, the fine engineered domain configuration appeared. On the basis of the above information, the 33 resonators with different domain sizes were successfully prepared. Their piezoelectric measurement revealed that the d 33 of the 33 resonators with fine engineered domain configurations was higher than that of BaTiO 3 single-domain crystals. Moreover, d 33 increased with decreasing domain sizes. The highest d 33 of 289 pC/N was obtained in the BaTiO 3 crystal with a domain size of 13 μm.