DIELECTRIC INVESTIGATION OF A SOLID-SOLUTION OF DEUTERATED BETAINE PHOSPHATE(0.95)BETAINE PHOSPHITE(0.05)

Measurements of the dielectric permittivity are reported for a solid s olution of deuterated antiferroelectric betaine phosphate(0.95) and fe rroelectric betaine phosphite(0.05) at frequencies in the range 20 Hz < nu < 1 MHz. This crystal orders antiferroelectrically at T-c = 140 K . The dielectric response over the whole of the temperature region 50- 300 K shows ac and de conduction. The activation energy of the de cond uction was found to be E(b) = 173 K (0.015 eV).