Hyperfine interactions in nanocrystalline Fe-Al alloys

Abstract

Nanocrystalline powder samples of Fe-30 at.% Al, Fe-40 at.% Al and Fe-50 at.% Al alloys were prepared by the mechanical alloying method. X-ray diffraction studies indicated that the solid solution with bcc structure was formed with increasing milling time for all investigated compositions. The magnetic ordering temperature of the nanocrystalline mechanically synthesized alloys was larger than that of the corresponding alloys on a micrometric scale. The magnetization curves as well as the Mössbauer spectra revealed that the Fe-Al alloys formed during the low energy ball milling process contained different magnetic phases.