Influence of Magnetic Field on Acoustic Emission
in Dislocation-Containing Silicon under Current Loading

A. A. Skvortsov, A. M. Orlov, V. A. Frolov, L. I. Gonchar, and O. V. Litvinenko

Ul’yanovsk State University, Ul’yanovsk, 432700 Russia

e-mail: scvor@sv.uven.ru

Received November 23, 1999; in final form, March 10, 2000

Abstract—The influence of weak (< 1 T) magnetic fields on acoustic emission (AE) of dislocation-containing
n-Si(111) under current loading j = (1–5) 10⁵ A/m² 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 peak 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 paramagnetic stoppers. This
facilitates the separation and motion of dislocations. Withdrawal of the magnetic field leads to the relaxation of
acoustic emission processes, which is determined by the dynamics of excited point centers interacting with a
dislocation. © 2000 MAIK “Nauka/Interperiodica”.

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