Abstract
Thermal depolarization current in KDP and ADP crystals doped with Cr 2O 2− 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 (H 2PO 4) − sub-lattice. The peaks observed at 235 and 210 K in ADP are considered to be due to the proton conduction in(H 2PO 4) − and (NH 4) + 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.
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