Direct observation of domain wall motion and lattice strain dynamics in ferroelectrics under high-power resonance
Mihail Slabki, K. V. Lalitha, Stefano Checchia, Lovro Fulanović, J. Daniels, Jurij Koruza
Abstract
Domain wall motion and lattice strain dynamics of ferroelectrics at resonance were simultaneously measured by combining high-power burst excitation and in situ high-energy x-ray diffraction. The increased loss at high vibration velocity was directly related to the increased domain wall motion, driven by dynamic mechanical stress. A general relationship between the microstructural strain contributions and macroscopic electromechanical behavior was established, allowing the prediction of high-power stability of ferroelectric materials. The results indicate that the materials' stability during high-power drive is predominantly related to the basic chemical composition, while the piezoelectric hardening mechanisms mainly influence the small-signal behavior.