Mössbauer Study on Nonequilibrium Disordered Fe–Al Alloys Produced by DC Sputtering

Abstract

Mössbauer spectra of Fe_1−xAl_x alloys produced by facing target type DC sputtering have been measured for x<0.75 at room temperature and 4.2 K . In the bcc alloys, hyperfine field distributions obtained by analyzing these spectra can be divided into three components characterized by three broad maxima. A nearest neighbor environment model, assuming random distribution of atoms, was successfully applied to explain the magnetic behavior of bcc alloys indicating that the sputtered FeAl alloys are in disordered state. The lattice constants of the bcc Fe–Al alloys were discussed in connection with the magnetic moment.