Substitutional Au concentrations, that were introduced by diffusion at temperatures of between 850 and 1000C, were measured by applying spreading resistance and deep-level transient spectroscopic techniques to float-zone and Czochralski samples with various orientations and dislocation densities. A comparison, within the same sample, of dislocated and non-dislocated regions permitted the efficiency of dislocations as sinks for self-interstitials to be measured. It was found that the efficiency was sensitive to the type of dislocation, to B doping and to the O content. In the case of float-zone material, the efficiency was independent of temperature. In the case of Czochralski-type material, a marked temperature dependence of the efficiency was observed. This was attributed to the release of dislocations, from obstacles, via a thermally stimulated climbing mechanism.

G.Mariani, B.Pichaud, E.Yakimov: Solid State Phenomena, 1996, 51-52, 3-14