Properties of high-temperature poling ferroelectric crystals congruent solid solution LiNb0.5Ta0.5O3

Lithium niobate and lithium tantalate are among the most important and most widely used materials in acousto-optics and acoustoelectronics. These materials have high values of piezoelectric constants, which makes it possible to use these materials as actuators; however, their use is limited by the thermal instability of a lithium niobate crystal and the low Curie temperature ( T C ) of a lithium tantalate crystal. LiNb (1-x) Ta x O 3 crystals have to overcome the aforementioned limitations of individual compounds. Crystals LiNb 0.5 Ta 0.5 O 3 were grown by the Czochralski method, of good quality. Comparative studies of the features of high-temperature single domainization of LiNb 0.5 Ta 0.5 O 3 crystals have been carried out. The main differences in the technological regimes for single-domainization of congruent LiNb 0.5 Ta 0.5 O 3 crystals from congruent LiNbO 3 crystals are demonstrated. The parameters of high-temperature electrodiffusion processing LiNb 0.5 Ta 0.5 O 3 crystals are presented, which make it possible to obtain single-domain crystals for further study of their physical properties.