Intermixing in epitaxial superlattices was investigated by means of double-crystal X-ray diffractometry. The diffusion coefficients were deduced, for various annealing temperatures (table 5), from the fading of satellite intensities in X-ray diffraction patterns during annealing. Diffraction patterns were simulated by numerical solution of the Takagi-Taupin equation, and calculated curves were fitted to experimental data on superlattice profile-smoothing due to diffusion.

X-ray diffraction investigation of diffusion in PbTe-PbSe superlattices A.G.Fedorov, I.A.Shneiderman, A.J.Sipatov, E.V.Kaidalova: Journal of Crystal Growth, 1999, 198-199[1-4], 1211-5

Table 5

Diffusion in PbTe/PbSe Superlattices