Figure 2 | Scientific Reports

Figure 2

From: Unravelling the local crystallographic structure of ferromagnetic \(\gamma '\)-\(\hbox {Ga}_y \hbox {Fe}_{4-y}\)N nanocrystals embedded in GaN

Figure 2

(a) Top: Ga K-edge DAFS for sample S5 acquired at the (002) diffraction plane of the NCs including the fluorescence from the matrix (—) and the pure matrix fluorescence signal (- -). Inset: intensity map and ROIs from where the two spectra have been obtained. Bottom: differential spectrum obtained from the two spectra shown in (a). (b) Corrected, normalized DAFS for all samples. The Ga-flow during the fabrication increases from top to bottom. (c) Comparison between DAFS simulation (top) and experimental data of S5 (bottom) with Ga occupying 3c sites. (d) Amount of Ga y in 3c sites in the \(\gamma '\)-\(\hbox {Ga}^{3c}_y \hbox {Fe}_{4-y}\)N NCs embedded in GaN plotted as a function of the normalized Ga-flow, obtained from the fabrication parameters.

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