On the orientation dependence of effective distribution coefficients of impurities

Germanium crystals doped by antimony are grown by the Czochralski technique along 12 different crystallographic directions. The effective distribution coefficients (K_ef) are determined here. It is shown that orientation dependence of k_ef could be explained by supercooling at growth surfaces correlating with number of layer systems {111} crossing that surfaces and with angles between that systems and direction of shift of the crystallization front.