It was found that, during the uniaxial compression of these crystals, transient polarization electric currents were detected that were of the order of some nA/cm2. These were attributed to the movement of segments of charged dislocation relative to Debye-Huckel clouds which consisted of point defects. During the micro-fracture stage of deformation, near-field electromagnetic disturbances with frequencies that ranged from kHz to MHz, were detected. These were attributed to electrical phenomena which were associated with micro-crack opening.

V.Hadjicontis, C.Mavromatou, Y.Enomoto: Materials Science Forum, 1997, 239-241, 425-8