Origin of the Apparent Electric-Field Dependence of Electrostrictive Coefficients
Abstract
Electrostrictive materials exhibit a strain that is proportional to the square of the induced polarization. In linear dielectrics where the permittivity is constant, this electromechanical strain is also proportional to the square of the electric field. However, under increasing amplitudes of the driving field, the electromechanical strain sometimes saturates; the electrostrictive coefficients therefore appear to depend on the amplitude of the electric field used to measure them. Here, we present a methodology showing that this apparent field dependence is a consequence of neglecting higher-order electromechanical phenomena. When these are taken into account, not only do the electrostrictive coefficients remain constant but the signs of the high-order coefficients enable the prediction of the saturation behavior from a single measurement. We illustrate this approach on both classical and non-classical (so-called ``giant'') electrostrictors.
Keywords
Cite
@article{arxiv.2404.14015,
title = {Origin of the Apparent Electric-Field Dependence of Electrostrictive Coefficients},
author = {Jiacheng Yu and Abdelali Zaki and Killian Mache and Omar Ibder and Sandrine Coste and Maud Barré and Philippe Lacorre and Pierre-Eymeric Janolin},
journal= {arXiv preprint arXiv:2404.14015},
year = {2024}
}