The substitutional Au concentration which was introduced by a diffusion step at temperatures of between 850 and 1000C was measured, by means of deep-level transient spectroscopy, in float-zone and Czochralski material which contained various dislocation densities. A comparison, for a given sample, of dislocated and non-dislocated regions permitted the efficiency of dislocations as sinks for self-interstitials to be measured as a function of the diffusion temperature. In the case of float-zone material, the above efficiency was found to be temperature-independent. In the case of Czochralski material, a marked temperature dependence of the efficiency was observed. This was attributed to the release of dislocations from obstacles via a thermally stimulated climb mechanism.

E.Yakimov, G.Mariani, B.Pichaud: Journal of Applied Physics, 1995, 78[3], 1495-9