Electrical properties of two-dimensional thin films of the ferroelectric material Polyvinylidene Fluoride as a function of electric field

The study of the electrical properties of two-dimensional ferroelectric materials is very interesting because of the many possible applications relating to effects on their polarization properties.In this work we study the effect of a sinusoidal electric field on the dielectric and electrical properties of uni-axially and biaxially stretched polyvinylidene fluoride (PVDF) films.We have determined the polarization current, remanent polarization, maximal polarization, the hysteresis loop and coercive field as a function of applied electric field amplitude.The most interesting effects are the electric field (E) dependences of the resistivity. It is shown that for the biaxially stretched PVDF sample, the resistivity is almost constant, whereas for the uni-axially stretched specimen, a large decrease of resistivity is observed.