Sol–gel autocombustion synthesis of Co–Ni alloy powder

Sol–gel autocombustion is confirmed to be an efficient method in the synthesis of Co–Ni alloy powder. Addition of adequate amount of ethanol can make the reduction reaction thorough and increase the purity of the samples. X-ray diffraction measurement indicates that the obtained samples consist of a single phase with bcc structure. Transmission electron microscopy study shows the grain size is about 10 nm. The magnetic measurements show that the samples are a soft magnetic material with the coercive field smaller than 100 Oe and the saturation magnetization about 95% of the theoretical value.