X-ray diffraction and Mössbauer studies of γ′-(Fe_1-xSn_x)₄N compounds (0.0≤x≤0.3)

The structure and magnetic properties of γ′-(Fe_1-xSn_x)₄N samples have been studied using X-ray diffraction and ⁵⁷Fe Mössbauer spectroscopy. It has been shown that the single-phase (Fe_1-xSn_x)₄N compounds can be prepared in the composition range of 0.0≤x≤0.3, which have the similar structure as γ′-Fe₄N The lattice parameter with the increase of Sn concentration can be well fitted with two linear relationships a₀(x)=3.795 + 0.019x (with x≤0.10) and a₀(x) = 3.797 + 0.228(x-0.10) (with 0.1≤x≤0.3). The fitting results of Mössbauer spectra indicate that the hyperfine parameters have the same changing tendency with lattice parameter, and the Sn atoms have a preference to be located at the corner site.