Electronic Structure of Fe₃Si‐Type Alloys I. X‐Ray Spectra of Mn₃Si, Fe₃Si, and Fe₃Al and Comparison with Band Structure Calculations

Al‐ and Si Kβ x emission spectra as well as Mn‐ and Fe L 2,3 emission and self‐absorption spectra of the alloys are measured using a primary Bragg‐Soller spectrometer. Within error limits, the energetical positions of features in the spectra agree with those from calculated band structures. It follows that the APW method is applicable also to magnetic alloys if the band model of ferromagnetism is used. In non‐SCF calculations the transition metal configuration 3d n ‐1 4s 1 gives better results than 3d n ‐2 4s 2 , as it is concluded from the relative position of s‐ and d‐bands.