Segregation of Ga in Ge and InSb in GaSb

Axial and radial segregation of (i) Ga in Ge and (ii) InSb in GaSb has been evaluated in crystals grown by the submerged heater method. The values of diffusion coefficients obtained by fitting the Tiller's equation to the initial transients in composition are significantly lower than the values in the literature, obtained by using shear cells with capillaries.