Higher order ferroic properties of TGS monocrystals

It follows from symmetry consideration that ferroelectrics should possess f erroelastoelectric properties also. The form of ferroelastoelectric domains of uniaxial <<pure>> ferroelectric triglycine sulphate (TGS) is determined . The effects of the influence of uniaxial mechanical pressure on dielectri c hysteresis loops of TGS single crystals are observed. Pressure applied in y-direction decreases height of saturated hysteresis loops (case of high a c-voltage) and increases height of non-saturated loops (case of low ac-volt age). In both cases coercitive field decreases with the pressure increase. Such a behavior may be connected with ferroelastoelectric properties of TGS crystals when uniaxial pressure produces favorable conditions on the domai n wall motion.