Investigations of elastic nonlinearities in ferroelectric crystals are interesting due to the large amount of information about lattice dynamics, on the one hand, and the wide applications of nonlinear properties of crystals in signal processing schemes, on the other hand. There are different methods for studying elastic nonlinearities of solids /l/. From the point of view of experimental sensitivity resonant methods are more preferable and, in particular, measurements of the fundamental frequencies of specimens versus alternating current amplitude in the so-called resonance-antiresonance methods /2/,
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.