Ferroelectric Polarization Switching in Polyvinylidene Fluoride

Switching transients of current and charge in form I PVDF have been measured in the time region faster than 1 ms under high electric field (140–200 MV/m) and in the temperature range from -20 to 20°C. A careful consideration in composing a switching circuit has been paid to reduce its time constant. The activation energy and field for the switching transient have been determined to be 0.63 eV ( E =200 MV/m, T =-20–20°C) and 1.3 GV/m ( T =20°C, E =140–200 MV/m), respectively.