X-RAY-DIFFRACTION AND MAGNETIZATION OF METASTABLE BCC AND AMORPHOUS PHASES IN FE1-XTIX SPUTTERED ALLOYS

Films obtained by rf sputtering have been investigated. The single bcc phase is extended up to about x equals 0. 18, while the amorphous phase is realized for x greater than 0. 2, where the intermetallic compound, TiFe//2 and the ordered phase, TiFe, are stabilized in the equilibrium alloys. The lattice constants of the bcc phase are about 0. 5% larger than those extrapolated from the results of bulk alloys. In the bcc alloys, the average magnetic moment decreases monotonically with increasing x and deviates downward from the simple dilution law. In the amorphous alloys, magnetic moments are smaller than those for the metastable bcc alloys. The magnetic moment and the Curie temperature in the amorphous alloys show weak concentration dependence in contrast to their strong concentration dependence in the equilibrium Laves phase TiFe//2.