The performance enhancement and temperature dependence of piezoelectric properties for Pb(Mg_(1/3)Nb_(2/3))O_3-0.30PbTiO_3 single crystal by alternating current polarization

摘要

The comparison and analysis of piezoelectric properties for [001]-oriented PMN-0.30PT by different polarization conditions were investigated. It should be noticed that the average piezoelectric coefficients d(33) of PMN-0.30PT crystals were 1860 pC/N by alternating current (AC) polarization and 1380 pC/N by direct current (DC) polarization, which indicates a promotion of 35.3%. The domain patterns in the [001] surface of PMN-0.30PT single crystals under different polarization conditions are obtained by piezo-response force microscopy. The enhancement of piezoelectric performance by AC polarization is attributed to the regular stripe domains with high domain wall density. With the temperature increased to TR-T, both the values of dielectric constant epsilon(T)(r) and piezoelectric coefficients d(33) under AC polarization condition maintain higher compared to traditional DC poled samples. In addition, both the values of e(33) and epsilon(S)(33) under AC polarization retain higher than that of DC polarization, suggesting that the special domain structure with high domain wall density by AC polarization keeps a stable state as the temperature increased to TR-T. When the temperature increased from TR-T to TT-C, the piezoelectric properties of crystals (epsilon(T)(r) and d(33)) under different polarization conditions become the same status, which indicates that the domain structure under the different conditions of polarization may tend to the similar state and the extrinsic contribution from the domain wall motion by AC polarization is disappeared. Published under license by AIP Publishing.