The Jordan thermoelastic, and Alexander-Haasen high-temperature creep, models for dislocation formation were considered. Their predictions were compared with experimentally measured etch pit densities on undoped crystals which had been grown by using the liquid encapsulated Czochralski technique. It was found that both models were capable of predicting the observed trends in dislocation density. The agreement was quantitative, and a fitting parameter had to be used only in the case of the simpler (thermoelastic) model. Satisfactory agreement was immediately obtained by using the thermoplastic approach.

S.Fogliani, M.Masi, S.Carrà, G.Guadalupi, B.Molinas, L.Meregalli: Materials Science Forum, 1996, 203, 187-92