Movement of dislocations in sodium chloride crystals in an electric field
- 1 September 1968
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 18 (153) , 531-538
- https://doi.org/10.1080/14786436808227458
Abstract
A plastic strain has been produced by the application of a suitably directed electric field to a NaCl crystal containing edge dislocations of predominantly one mechanical sign. By comparing this strain with that produced by applying a stress to the same specimen the dislocation charge at room temperature was found to be about −3·8 × 10−13 C cm−1. A similar value was determined from the polarization produced in the specimen under stress. The results are consistent with the hypothesis that dislocations which carry a charge when they move under stress experience a force in an electric field arising from the action of the field on this same charge.Keywords
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