Mossbauer study and band structure of FeSi₂

Abstract

A study of the Mossbauer effect as a function of temperature has been carried out for the two crystallographic phases of FeSi2. The spectra show a quadrupole splitting for all Fe positions which slightly decreases with increasing temperature. The isomer-shift values are characteristic for covalent Fe compounds. For each structure a band model is proposed, explaining the differences in electrical and magnetic properties.