Abstract
We measured the dynamic small strain effects in electrostrictive ceramics with a high resolution fiber optic interferometer. The dynamic strain response of both a lead magnesium niobate (PMN) and a lead zirconate titanate (PZT)-based electrostrictive ceramic exhibited a residual signal which cannot be understood by the simple scalar strain-polarization relationship, e+QP2. The magnitude of the residual signal decreased as a function of increasing temperature indicating that the residual strain signal has origins in the remnant electric polarization of the material. The magnitude of the residual strain was generally higher for the PZT-based electrostrictor than for the PMN based sample. The observed residual strain signal represents a novel phenomenon previously unseen in the dynamical strain response of electrostrictive ceramics.
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