Abstract
Fe–Co alloy was successfully prepared in chloride-sulfate solutions containing sodium propargyl sulfonate using electrodeposition method. The phase composition, surface morphology and magnetic properties of Fe–Co alloy were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM), respectively. Linear sweep voltammetry and chronoamperometry was used to investigate the electrodeposition behavior. The iron content of Fe–Co alloy decreases and the surface of film becomes smoother with an increase of sodium propargyl sulfonate. The film structure shows no dependence on sodium propargyl sulfonate. The film exhibits a body-centered cubic (BCC) structure and shows no dependence on sodium propargyl sulfonate. With 0.6 g/L sodium propargyl sulfonate, the Fe–Co alloy has a saturation magnetization of 1.91 T and a coercivity of 5.02 Oe. The initial electrodeposition potential shows negative shift and the apparent activation energy increases from 39.57 kJ/mol to 112.47 kJ/mol. The nucleation mechanism of Fe–Co alloy is gradually changed from instantaneous to progressive with the addition of sodium propargyl sulfonate.
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