Dynamics of the polarization growth in P(VDF-TrFE) copolymers

The formation of the dielectric displacement under an applied electric field and the remanent polarization after switching-off of the electric field is studied in P(VDF-TrFE) copolymers as a function of the duration of the electric poling field. A time delay is observed between the orientation of the dipoles and their stabilization, leading to remanent polarization. This time delay is reduced with increasing crystallinity of the films. The poling time necessary to saturate the remanent polarization is determined and found to be dependent on the poling field strength