Fatigue of Pb(Zr0.52Ti0.48)O3 (PZT) thin-film capacitors was studied under UV light (He-Cd laser, λ=325 nm). The remanent polarization of the PZT film capacitors increased upon light illumination. Fatigue resistance was also improved under UV light. During fatigue test, the change in polarization of PZT films upon UV light illumination increased gradually with cycling. These results were examined within the framework of the polarization screening model, which is suggested as an essential process for fatigue. This leads to a conclusion that more charged defects are involved in the fatigue process through internal screening of polarization.

Electric field modulation of magnetism and electric properties in La-Ca-MnO3/Pb(Zr0.52Ti0.48)O3 magnetoelectric laminate J. Appl. Phys. 113, 17C712 (2013); 10.1063/1.4795871 Structure and properties of epitaxial perovskite Pb(Zr0.52Ti0.48)O3/La0.7Sr0.3MnO3 heterostructures

The temperature and frequency dependences of the pyroelectric current have been studied in Nylon 7 and Nylon 11 ferroelectric polymer films. A remarkable change of value of the pyroelectric currents near the glassy transition temperature (Tg) was observed. Analyses of experimental data show that the temperature behavior of pyroelectric currents can be explained by the competition of the primary and secondary effects. Currents due to these effects have different signs. Below Tg, the dominant component of the pyroelectric current is primary pyroelectricity, and above Tg the secondary effect becomes dominant. Mechanisms producing pyroelectric currents in Nylon 7 and Nylon 11 are discussed.

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