Influence of magnetic field on acoustic emission in dislocation-containingsilicon under current loading

The influence of weak (< 1 T) magnetic fields on acoustic emission (AE) of dislocation-containing n-Si(111) under current loading j = (1-5) x 10(5) A/ m(2) is investigated. It is found that the combined effect of the magnetic and electric fields leads to an increase in the acoustic emission response by a factor of 1.5 and is responsible for the emergence of an additional pe ak in the AE spectra at a frequency of 1.7-1.8 Hz. The result is explained by the influence of magnetic fields, which changes the energy state of para magnetic stoppers. This facilitates the separation and motion of dislocatio ns. Withdrawal of the magnetic field leads to the relaxation of acoustic em ission processes, which is determined by the dynamics of excited point cent ers interacting with a dislocation. (C) 2000 MAIK "Nauka/ Interperiodica".