Abstract
Abstract The viscous force arising from the relative motion between charged dislocations and surrounding charge clouds in ionic crystals is obtained by revising the formulation of Brown, from which the forces in the high-frequency region are calculated and Robinson's hypothesis in that region is proved to be approximately correct. The polarization of the dislocation cloud system is also calculated. Combining this and the string model for the dislocation, the stress-induced polarization, the mechanical damping and the compliance defect due to a single charged dislocation are calculated for all frequencies.
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