A Mossbauer study of electrodeposited Fe_1-xCo_x alloys

The specimens of Fe_1-xCo_x alloys obtained by electrodeposition onto graphite were tested by Mossbauer spectroscopy and X-ray diffraction. Two structural transformations from the body-centred cubic to the face-centred cubic and further to the hexagonal, as the Co concentration increases, were observed. How the hyperfine field depends on the occupancies of the 3d and 4s states was deduced. Changes in the preferred direction of domain magnetization caused by the variable Co concentration have also been observed.