Abstract
Mössbauer measurements have been made on iron-rich solid solutions of the Fe+As and Fe+Sb systems to investigate the origin of the increase in moment per Fe atom upon alloying. The envelope of the experimental data is not exactly fitted on the assumption of a random solid solution for models with either 2 or 4 coordination shells. The system dependence of the magnetic hyperfine field appears to correlate with the increase in average Fe moment upon alloying. The change in the magnetic hyperfine field at Fe nuclei due to nn and nnn solute atoms is similar to that found for other alloys. Quadrupolar broadening due to disorder in the 2nd or higher coordination shells leads to approximately symmetrical linebroadening.
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