Nanosecond Switching in Thin Fims of Vinylidene Fluoride/Trilluoroethylene Copolymers

High-field switching characteristics have been investigated in the spin-coated thin films of vinylidene fluoride/trifluoroethylene copolymers containing 52, 65, 73 mol% of the former. The switching times of three copolymers are identical af fields from 150 to 500 MV/m, following an exponential dependence on the reciprocal field. The observed fastest switching time is 100 nsec which is shorter than the dielectric relaxation time associated with crystalline dipole motions. The result indicates that total reorientation of crystalline dipoles occurs faster than the correlation time of their natural fluctuations.