Small-angle X-ray studies of the GaAs0.7Se0.3 solid solution at energies close to as and Se absorption edges

• Published in: Journal of structural chemistry 2014-07, Vol.55 (4), p.786-790
• Main Authors: Sharkov, M. D., Boiko, M. E., Boiko, A. M., Bobyl, A. V., Konnikov, S. G.
• Format: Article
• Language: English
• Subjects: 2013; Atomic; Atomic/Molecular Structure and Spectra; Chemistry; Chemistry and Materials Science; Inorganic Chemistry; Molecular; Novosibirsk; Optical and Plasma Physics; Physical Chemistry; Proceedings of the Conference “Methods for Studying the Composition and Structure of Functional Materials,” October 21–25; Solid State Physics
• ISSN: 0022-4766; 1573-8779
• DOI: 10.1134/S0022476614040301

The possibility of a simultaneous use of X-ray diffraction and X-ray absorption techniques in order to characterize the sizes, shapes, and chemical composition of grains in a sample (the solution of the extended uncertainty problem due to the Babinet principle) is shown. A sample of the GaAs 0.7 Se 0.3 /GaAs solid solution is investigated on the developed laboratory device for a simultaneous performance of X-ray diffraction and X-ray absorption experiments. It is shown that the GaAs 0.7 Se 0.3 sample decomposes into separate GaAs and GaSe domains forming a mosaic structure. The sizes of GaAs and GaSe domains are estimated. Components with a linear geometry are sometimes revealed in the composition of GaSe grains.