Phase evolution and magnetic properties of FeCo films electrodeposited at different temperatures

In this paper, FeCo alloys with different phase structure and magnetic properties were successfully electrodeposited at different temperatures (20-90 °C). The crystallographic structure and magnetic properties of FeCo alloy films were studied. The Co content is increased while Fe content is decreased with increasing bath temperature. The X-ray diffraction and X-ray absorption near edge spectroscopy analysis reveal that the phase structures of the films strongly depend on the bath temperatures and a metastable α-Mn type phase (Co0.72Fe0.28) was formed at 50-80 °C. The saturation magnetization reaches a maximum value of 1890 emu/cc and coercivity reaches a minimum value of 10 Oe of the film electrodeposited at 50 °C in all the samples.