Electrical Conductivity and Thermal Depolarisation Studies of CrO2−4 and Cr2O2−7 Doped KDP and ADP Crystals

The electrical conductivity and thermal depolarisation of both undoped and anionic impurity doped KDP and ADP crystals are studied. The proton transport in both the H2PO−4 and NH+4 sublattices seems to be responsible for the conductivity and ITC of ADP crystals doped with CrO and Cr2O ions. In the case of KDP crystals doped with these ions, the proton transport in H2PO−4 sublattice itself can account for the experimental results. The activation energies for the proton migration in these lattices are determined.