SMALL-ANGLE X-RAY STUDIES OF THE GaAs
0.7Se
0.3 SOLID SOLUTION AT ENERGIES CLOSE TO As AND Se ABSORPTION EDGES
M.D. Sharkov, M.E. Boiko, A.M. Boiko, A.V. Bobyl, S.G. Konnikov
Ioffe Physical Technical Institute, St. Petersburg, Russia
Keywords: малоугловое рассеяние рентгеновских лучей (МУРР), край поглощения, арсенид галлия, селенид галлия, мозаичная структура, small-angle X-ray scattering (SAXS), absorption edge, gallium arsenide, gallium selenide, mosaic structure
Abstract
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
0.7Se
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
0.7Se
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.
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