Wegener Michael
Fraunhofer Institute for Applied Polymer Research, Functional Polymer Systems, Geiselbergstrasse 69, 14476 Potsdam-Golm, Germany.
Rev Sci Instrum. 2008 Oct;79(10):106103. doi: 10.1063/1.2972169.
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.
极化电场滞后是铁电材料的一个重要特性。为了确定这种滞后行为，人们展示并经常使用不同的实验程序和测量方法。对于铁电聚合物极化行为的表征，通常会分析极化电流并分离电流贡献，这些贡献基于对样品电容的充电以及电导率。在实验中，这可以通过两种不同的测量方法来实现，即对样品进行双极循环极化或采用施加电场的双极和单极循环序列。在此，我们通过对同一铁电聚偏氟乙烯（PVDF）样品进行极化实验，展示了这两种测量程序的比较。
