抄録
Piezoelectric hysteresis understanding is a key toward better displacement control of devices requiring high strain like micropositionners and adaptive optic systems. Large strain, in the non-resonant regime, requires high electric fields, which lead to an enhancement of the nonlinear/hysteresis effect and results in a lack of controllability.
The modeling of the ferroïc hysteresis proposed here is based on a analogy with the dry friction concept used in mechanics. It is anticipated that the pinning/depinning domain wall motion is similar to a mass motion on a support presenting a dry friction dissipative force. From the model, a relationship showing the equivalence of the electric field and the stress by poling product is derived. It is shown that from the electric field influence on the polarization, the stress behavior is derived.
Starting from the model, which is intrinsically hysteretic, the purely linear behaviors are eventually modeled, and the correlation between linear coefficients and the polarization states is presented. Rayleigh region behaviors are easily retrieved from the proposed model.
