X-ray diffraction and Mössbauer Studies of γ′-(Fe1−xSnx)4N compounds (0.0⩽x⩽0.3)

The structure and magnetic properties of γ′-(Fe 1− x Sn x ) 4 N samples have been studied using X-ray diffraction and 57 Fe Mossbauer spectroscopy. It has been shown that the single-phase (Fe 1− x Sn x ) 4 N compounds can be prepared in the composition range of 0.0⩽ x ⩽0.3, which have the similar structure as γ′-Fe 4 N The lattice parameter with the increase of Sn concentration can be well fitted with two linear relationships a 0 ( x )=3.795+0.019 x (with x ⩽0.10 ) and a 0 ( x )=3.797+0.228( x −0.10) (with 0.1⩽ x ⩽ 0.3). The fitting results of Mossbauer 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.