Abstract
Glide dislocations in CdS and CdTe have been studied by transmission electron microscopy, using the weak-beam technique. Dislocation glide planes, Burgers vectors and types (α or β) were identified. In both materials, both α and β dislocations were found to be dissociated, with dissociation widths corresponding to γ = 9.7±1.7 mJ m-2 (CdTe) and γ = 85±21 mJ m-2 (CdS). The values of γ for α and β dislocations in CdTe were determined separately, and found not to be significantly different.Dislocation motion in CdS and CdTe was observed, in situ, in the electron microscope, and the dislocations were seen to remain dissociated during motion.
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