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X-ray diffraction investigation of diffusion in PbTe–PbSe superlattices

Authors
Journal
Journal of Crystal Growth
0022-0248
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/s0022-0248(98)01075-6
Keywords
  • Superlattice
  • Diffusion
  • X-Ray
Disciplines
  • Computer Science

Abstract

Abstract Diffusion intermixing in PbTe–PbSe epitaxial superlattice was investigated with help of the double-crystal X-ray diffractometry. Diffusion coefficients were defined for different annealing temperatures from the regular fading of satellites intensities on the X-ray diffraction patterns in the course of annealing. Theoretical grounds and computational treatment of experimental data are presented. Diffraction patterns have been simulated by numerical solution of the Takagi–Taupin equation and calculated curves were fitted to experimental ones accounting the superlattice profile smoothing due to diffusion. Diffusion coefficients determined by both procedures are in a good agreement.

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