A transmission electron microscopyin situstudy of dislocation mobility in Ge

In situ deformation experiments were performed on pure Ge. In addition to qualitative observations being made, the velocity of dislocations was measured as a function of dislocation character and length at various temperatures and stresses. The local effective stress was estimated from the curvature of the dislocations. Combining the in situ results with double-etch-pit experiments allows estimation of the mean free path of kinks. Then a set of material parameters are calculated within the framework of the Hirth–Lothe theory.