Abstract
A series of ferromagnetic alloys Fe2Cr(1−x)Mn x Al were prepared by arc melting for x=0 to 0.05. The alloys are single phased, but disordered with B2 type structure. Variation of the lattice parameter with concentration of Mn is smooth with a maximum occurring at x=0.02. Highest Curie temperature (T C) corresponds to sample with x=0.02. Mossbauer spectra for these alloys show the presence of a paramagnetic peak along with the magnetic hyperfine field. This co-existence can be explained by clustering of Mn atoms. The hyperfine field distribution shows the presence of a single, broad component of field. The variation of this component as well as saturation magnetization follows the variation in the lattice parameter with concentration of Mn. Mossbauer and X-ray studies point to the disorder present in these alloys.
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