Abstract
Abstract Diffusion profiles of gallium in germanium containing a small-angle symmetric tilt boundary have been determined as a function of temperature and misorientation angle. The observed diffusion tails cannot be described in terms of the phono-monological pipe diffusion or grain-boundary diffusion models. The results may be understood by diffusion along a second phase, containing Ge, which forms around the dislocations, and in which the solubility of gallium is about 102 103 times that in the unperturbed germanium matrix.
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