A QUANTITATIVE-ANALYSIS OF THE POLARIZATION REVERSAL IN THE 73 MOL PERCENT VINYLIDENE FLUORIDE-27 MOL PERCENT TRIFLUORETHYLENE COPOLYMER

We show that a time-dependent, effective-medium approximation essentia lly explains the time behavior of the polarization reversals obtained in doped copolymers of vinylidene fluoride and trifluorethylene at 60 degrees C by Ieda, Fukada, and Wada [J. Appl. Phys. 64, 2026 (1988)], who attributed the observed effects to charge accumulation at the boun daries of the permanently polarized crystallites. Moreover, the result s seem to indicate that some hindrance (perhaps of mechanical origin) opposes the action of the switching electric field.