The core-shell Fe/Mn_(0.6)Zn_(0.4)Fe_2O_4soft magnetic composites were prepared under Ar atmosphere by chemical coprecipitation at high temperature.The effects of Mn_(0.6)Zn_(0.4)Fe_2O_4contents and sintering temperature on the microstructure and magnetic properties of the composites were investigated.The results show that the saturation magnetization and the effective permeability of the composite magnetic powder core increase first and then decrease with the increase of the heat treatment temperature when...