Effect of Cerium on Structure and Magnetic Properties of Electroless Plating Co-Ni-P Alloy Films

The effects of cerium on the chemical composition,structure and magnetic characteristics of electroless Co-Ni-P alloy coatings were studied by using plasma transmitting spectrograph,electron energy spectrometer,X-ray diffractometter and vibrating sample magnetometer.The results show that with the increase of cerium in the plating bath,the P content in the alloy coatings decreases,and Ce,Co and Ni contents in the alloy coatings increase,as a result,the microstructure of the alloy coatings are changed from an amorphous structure to a microcrystalline and crystalline structure,the saturated magnetic intensity and coercivity of the coatings are increased with adding of the rare earth element cerium,and the remanent magnetic intensity of the coatings are decreased meanwhile.