On the validity of the fitting model of transmission Mössbauer spectra of Fe₇₈Si₉B₁₃ amorphous alloy Available to Purchase

⁵⁷Fe Mössbauer spectrometry in transmission geometry is used to study the effect of the wheel’s tangential velocity in a melt spinning method on the resulting properties of Fe₇₈Si₉B₁₃ amorphous ribbons. According to the spectra obtained at room temperature all samples are ferromagnetic and no signs of crystalline phases were observed. The acquired Mössbauer spectra were fitted by two different models employing distributions of hyperfine magnetic fields, P(B). The fitting models differ in the ranges of hyperfine magnetic fields, B, which were taken into consideration when P(B) distributions were constructed. We have used the NORMOS fitting program. At the first glance it is quite feasible to fit spectra using both models. They are compared in terms of the shapes of P(B) distributions, their average values <B>, standard deviations, chi-squares and other spectral parameters. Majority of the considered parameters do not considerably differ for both models within the experimental error range. One exception is standard deviation which exhibits lower values in the fitting model which uses narrow-field range.