STUDIES ON ORIENTED DOMAIN POLYSTYRENE TGS COMPOSITE FILMS

Polymer ferroelectric films were prepared by dispersing TGS powder in polystyrene. Permittivity versus temperature plots exhibit a peak at a round the transition temperature of TGS. The peak gets suppressed with increasing frequency and the trend continues up to microwave frequenc ies. We observed that the dielectric constant of films at microwave fr equency stays close to the dielectric constant of polystyrene. The dom ain structure of TGS crystals essentially seems to affect their dielec tric properties. Single domain films exhibit a higher spontaneous pola rization and a higher coercive field.