Mossbauer spectroscopy studies in supersaturated Fe/sub x/Co/sub 50-x/Cu/sub 50/ solid solutions

Local structural change in mechanically alloyed Fe/sub x/Co/sub 50-x/Cu/sub 50/ (x=10, 20, 30, 40 and 50) powders has been investigated by Mossbauer spectroscopy and X-ray diffractometry at room temperature. Mossbauer spectra from mechanically alloyed Fe/sub x/Co/sub 50-x/Cu/sub 50/ samples consist of three different subspectra: a sextet, a broad sextet and a doublet corresponding to an /spl alpha/-Fe phase, to a disordered ferromagnetic phase of fcc solid solution, and to a non-ferromagnetic phase, respectively. With increasing processing time, the disordered ferromagnetic phase becomes dominant, indicating a formation of fcc solid solution during mechanical alloying. With increasing Co content, the hyperfine field of the disordered magnetic phase increases from about 20 to 25 T.