Abstract: A method for depolarization suppression of in rhombohedral relaxor-based ferroelectric single crystal. The purpose of the present invention is to address the problem that the rhombohedral relaxor-based ferroelectric single crystals would depolarize when driven to sufficiently electric field due to their low coercive field. In the present invention, the crystal cut, poling direction and compressive stress application direction of the crystal is selected based on the domain structure and anisotropic nature of the crystal such that the spontaneous direction(s) of the crystal would rotate towards the poling direction in response to the applied compressive stress. Through application of appropriate compressive stress, the magnitude of depolarization field of the rhombohedral relaxor-based ferroelectric single crystals can be effectively increased.

Abstract: A method for depolarization suppression of in rhombohedral relaxor-based ferroelectric single crystal. The purpose of the present invention is to address the problem that the rhombohedral relaxor-based ferroelectric single crystals would depolarize when driven to sufficiently electric field due to their low coercive field. In the present invention, the crystal cut, poling direction and compressive stress application direction of the crystal is selected based on the domain structure and anisotropic nature of the crystal such that the spontaneous direction(s) of the crystal would rotate towards the poling direction in response to the applied compressive stress. Through application of appropriate compressive stress, the magnitude of depolarization field of the rhombohedral relaxor-based ferroelectric single crystals can be effectively increased.