Acoustic emission produced by a moving edge dislocation in an isotropic crystal was investigated theoretically. It was shown that the acoustic-emission spectrum associated with a dislocation breaking away and coming to rest was similar to that associated with the annihilation of two dislocations. In the case where a linear defect breaks away and comes to rest periodically, additional extrema appeared in the acoustic-emission spectrum and the frequencies corresponding to the maxima in the spectrum were multiples of the dislocation hopping frequency between minima of the potential-energy profile. Both cases of large and small distances of the acoustic-emission detection point from a dislocation array were considered. The latter case was exemplified by experimentally observed acoustic emission associated with electric-field-stimulated motion of edge dislocations.

Acoustic Emission Caused by an Edge Dislocation Breaking Away and Coming to Rest in an Isotropic Medium. A.A.Skvortsov, O.V.Litvinenko: Physics of the Solid State, 2002, 44[7], 1291-7