Mechanism of ion movement in alkali halides

Ramdas, S. ; Shukla, A. K. ; Rao, C. N. R. (1973) Mechanism of ion movement in alkali halides Physical Review B: Condensed Matter and Materials Physics, 8 (6). pp. 2975-2981. ISSN 1098-0121

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The energies of ion migration in KCl through isolated vacancies, vacancy pairs, trivacancies, and interstitials have been investigated. A path-variation study in the case of vacancy and vacancy-pair mechanisms show that the usually assumed path in the (100) plane is the most probable one. Trivacancies do not seem to contribute to high-temperature conduction. On the other hand, the formation of a Frenkel defect pair and interstitialcy migration through a collinear path may be responsible for the nonrandom deviations in ionic conductivity data at high temperatures.

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Source:Copyright of this article belongs to The American Physical Society.
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