The thermally stimulated discharge current has been measured at low temperatures for magneto-electret samples of PVDF prepared at different magnetic field strengths and forming temperatures. A number of peaks observed below room temperature are discussed.

The surface charge of poly(vinylidene fluoride) films, which were magnetically treated at different temperatures, was measured using an improved method described by Sessler. Changes of the charge densities at both surfaces of the sample were studied in dependence on the magnetic field strength, temperature and poling time.

Thermally Stimulated Discharge Current (T3DC) in the case of polyvinylidene fluoride film treated chermomagneticaüly has been studied at different linear heating rates, preparing then at various polarizing fields (H 7 ) and Temperatures (T F ). TSDC spectra consists of two peaks at different temperatures (i) 60° to 70° and (ii) 190° to 196° termed as α-and ρ-peaks respectively. The values of activation energy calculated by two different methods show the existence of two tips of traps. TSDC with different heating rates suggests that low heating rates are preferable. The effect of thickness and storage tine has also been studied.