Abstract
Acoustic emission produced by a moving edge dislocation in an isotropic crystal is investigated theoretically. It is shown that the acoustic-emission spectrum associated with a dislocation breaking away and coming to rest is 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 appear in the acoustic-emission spectrum and the frequencies corresponding to the maxima in the spectrum are 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 are considered. The latter case is exemplified by experimentally observed acoustic emission associated with electric-field-stimulated motion of edge dislocations in silicon.
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Translated from Fizika Tverdogo Tela, Vol. 44, No. 7, 2002, pp. 1236–1242.
Original Russian Text Copyright © 2002 by Skvortsov, Litvinenko.
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Skvortsov, A.A., Litvinenko, O.V. Acoustic emission caused by an edge dislocation breaking away and coming to rest in an isotropic medium. Phys. Solid State 44, 1291–1297 (2002). https://doi.org/10.1134/1.1494624
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DOI: https://doi.org/10.1134/1.1494624