Polarization-electric field hysteresis of ferroelectric PVDF films: comparison of different measurement regimes.
Polarization-electric field hysteresis is an important property of ferroelectric materials. Different experimental procedures and measurement regimes are demonstrated and frequently used in order to determine this hysteresis behavior. For the characterization of the poling behavior of ferroelectric polymers it is common to analyze the poling current and separate current contributions, which are based on charging the sample capacitance as well as on conductivity. Experimentally this can be realized with two different measurement regimes, either poling of the sample with bipolar cycles or with a sequence of bipolar and unipolar cycles of the applied electric field. Here, we demonstrate the comparison of both measurement routines by performing poling experiments on the same ferroelectric PVDF sample.
Wegener
Michael
M
Fraunhofer Institute for Applied Polymer Research, Functional Polymer Systems, Geiselbergstrasse 69, 14476 Potsdam-Golm, Germany. michael.wegener@iap.fraunhofer.de