Thermal depolarization in dichromate doped KDP and ADP single crystals

Thermal depolarization current in KDP and ADP crystals doped with Cr2O2-7 have been studied in the temperature range of 80-300K. The single peak observed at 200K in KDP has been explained by considering the proton conduction in (H2PO4)- sub-lattice. The peaks observed at 235 and 210 K in ADP are considered to be due to the proton conduction in(H2PO4)- and (NH4)+ sublattices, respectively. The relevant relaxation parameters for the dipoles in both the crystals have been obtained. The results are compared with conductivity and dielectric lose measurements in these crystals. © 1979.