Lithium Niobate and Lithium Tantalate

This lecture covers the main facts about Lithium Niobate (LN) and Lithium Tantalate (LT), including their elastic and piezo modules, high dielectric permittivity, and temperature dependence. It discusses the growth of large crystals, mechanical properties, and commercial availability. The lecture also delves into the deformation, polarization, and electric field characteristics of LN and LT, emphasizing the importance of crystal orientation and electric field direction. Various coefficients and properties of these materials are explored, such as elastic coefficients, piezoelectric coefficients, and dielectric coefficients. The lecture concludes with a discussion on acoustic waves, slowness curves, and wave modes in rotated cuts of these materials.