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(Color online) Sketch of BiAs and BiGa configurations.
(Color online) FT of the Bi L2-edge EXAFS spectrum for the x = 1.2% sample (continuous line) along with simulations performed for the BiAs (circles) and BiGa (dashed line) configurations. FT modulus is vertically shifted with respect to the FT imaginary part for better visualization. Δk interval for the FT was [3.2–12.4 Å−1], ΔE = 3.71 eV. Inset: background subtracted k *χ (k) spectrum.
(Color online) Magnitude of FT of the Bi L2-edge EXAFS spectra for the three samples (continuous line) along with best fits (open circles) obtained combining the BiAs and BiGa configurations. Δk = [3.2–12.4 Å−1], ΔE = 3.71 eV. Inset: imaginary part of the FT (data and fits).
Samples characteristics and fit results. Bi concentration was measured with RBS, film thickness was obtained by XRD simulations and RBS profiles, BiGa fraction was extracted by fitting the EXAFS data.
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