Abstract
Electrical conductivity and optical absorption of divalent cation and anion doped KCl crystals have been measured before and after quenching from 750 °C. The conductivity after quenching is found to decrease in undoped and cation doped crystals while it increases in the anion doped crystals. This is due to higher coagulation rate of cation impurities as compared to anion impurities. Since the divalent impurities diffuse in the form of impurity-vacancy complexs, the higher mobility of cation vacancies (which form dipoles with divalent cation impurities) accounts for the higher aggregation rate of the cation impurities. The aggregation rate, during annealing after quenching, has also been found to depend on concentration.
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The author is indebted to Prof. H. N.Bose for helpful discussions. Thanks are also due to Dr. M. L.Mukherjee for providing the crystals.
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Bhuniya, R.C. Effect of quenching on the electrical conductivity of doped KCl crystals. Czech J Phys 27, 1164–1169 (1977). https://doi.org/10.1007/BF01589008
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DOI: https://doi.org/10.1007/BF01589008