An experimental investigation was made of the mobility of edge dislocations in Ca-doped single crystals, and of the effect of a static magnetic field of 0.3T upon the dislocation mobility. Experiments on the effect of a magnetic field upon the dislocation mobility were carried out by using a high-resolution (1ms) method that permitted the in situ measurement of the sample dipole moment that was induced by the motion of charged dislocations as the crystal was deformed. It was found that the starting stress was reduced in a magnetic field, and that the activation volume for the overcoming of point defects by dislocations was increased. It was also found that the magnetic field increased the rate of motion of the dislocations in the initial stages of deformation (up to the point of dislocation multiplication) but had no effect upon the mobility in the multiplication stage.

In situ Investigation of the Effect of a Magnetic Field on the Mobility of Dislocations in Deformed KCl:Ca Single Crystals. Y.I.Golovin, R.B.Morgunov, V.E.Ivanov: Physics of the Solid State, 1997, 39[4], 550-3