Magnetically stimulated variation of dislocation mobility in plastically deformed n-silicon

The acoustic emission method is employed for an experimental investigation of the effect of a magnetic field on the mobility of edge dislocations in a plastically deformed n-silicon sample carrying a current. It is found that the preliminary treatment of a dislocated crystal in a constant magnetic f ield (B < 1 T) changes the intensity of its acoustic response depending on the magnetic induction. The observed effect is associated with spin-depende nt magnetosensitive reactions of defects occurring in the vicinity of the d islocation core, which facilitate the detachment of the dislocations from t he stoppers and, hence, increase the mobility of dislocations and the acous tic response of the dislocation structure. (C) 2001 MAIK "Nauka/Interperiod ica".