The Temperature Dependence of the Charge on Dislocations in NaCl and the Determination of the Separate Free Energies of Formation of Positive‐ and Negative‐Ion Vacancies | Zendy

Davidge R. W. | Zendy

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The Temperature Dependence of the Charge on Dislocations in NaCl and the Determination of the Separate Free Energies of Formation of Positive‐ and Negative‐Ion Vacancies

Author(s) -

Davidge R. W.

Publication year - 1963

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.19630031009

Subject(s) - ion , dislocation , impurity , condensed matter physics , charge (physics) , materials science , crystal (programming language) , crystallography , chemistry , physics , organic chemistry , quantum mechanics , computer science , programming language

The temperature dependence of the sign of the charge on edge dislocations is investigated for several crystals containing low impurity concentrations. Below a certain critical temperature (from 400 to 550 °C depending on the crystal) the dislocations have a negative charge whilst above this temperature they have a positive charge. Results are analyzed in terms of the theory of charged dislocations; the free energies of formation (at 0 °K) of positive‐ and negative‐ion vacancies at dislocation jogs are found to be g + 0= (0.95 ± 0.10) eV, g − 0= (1.17 + 0.10) eV.

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