Mössbauer measurements in iron-base alloys with nontransition elements

Abstract

The hyperfine field and isomer shift at iron sites in dilute iron-base alloys containing Ge, As, Sn, and Sb impurities were determined by Mössbauer measurements. Similar information was obtained for the tin sites in $\mathrm{Fe}$ Sn alloys. These experimental data, together with those published earlier for Al, Si, and Ga solutes, support a model which supposes that only the impurity excess $p$ electrons take part in the charge screening. The interactions between iron spin-up $3d$ electrons and impurity $4s^2$ or $5s^2$ electrons are held responsible for the increase in iron moment with impurity concentration in the case of Ga, Ge, As, Sn, and Sb solutes.