Magnetic properties of metastable Fe-Al alloys produced by vapor quenching

Fe-Al alloy films have been obtained by rf sputtering technique and have been investigated by means of X-ray diffraction, magnetization and Moessbauer effect measurements. A well disordered bcc phase is extended up to about 70 at%Al, an amorphous phase between 75 and 85 at%Al and an fcc phase from 90 to 100 at%Al. The disordered bcc alloys are ferromagnetic at low temperatures and show a perpendicular magnetic anisotropy at 290K for about 38 at%Al. The amorphous and fcc alloys are paramagnetic even at 4.2K. (author)