Takeo applied electric field but also the preceding

Takeo Furukawa et. al.58 reported the preparation of vinylidene fluoride/trifluoroethylene copolymer thin films by spin-coat method followed by annealing process.these films have a remanent polarization of about 85mC/m2.The switching time ?s of these films were independent of thickness if Au electrodes were used instead of Al electrodes.

Different metal electrodes exhibit anisotropic ?s due to a potential difference between metal electrodes produced by their work function difference. Continuous switching under bipolar on-off electric field pulses revealed an accelerated polarization reversal with decreasing pulse width. This means that ?s is a function of not only applied electric field but also the preceding poling conditions. Fatigue was significantly improved using Au electrodes instead of Al electrodes.

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