Abstract
Fe1−xTix alloy films obtained by rf sputtering technique have been investigated by X-ray diffraction and magnetization measurements. The single bcc phase is extended up to about x=0.18, while the amorphous phase is realized for x>0.2, where the intermetallic compound, TiFe2 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 the bulk Fe–Ti 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 much 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, TiFe2.
