Spatial-temporal control of polarization reversal characteristicsin ferroelectric polymer and development of non-volatile polymer memory devices

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Copolymers of vinylidene fluoride are high-performance ferroelectrics, although their microscopic understanding is missing due to their complex structure. In this study, we clarified the polarization reversal process microscopically by use of a piezoresponse force microscope that scans the distribution of polarization with a cantilever. We also measured the polarization reversal process at very short time and found that these polymers show very quick polarization reversal. In addition, we manufactured memory devices with a ferroelectric polymer and clarified the electronic behavior in these devices.