Magnetic properties of CoWP film by electroless deposition

摘要

CoWP magnetic films on aluminum substrates were prepared by electroless deposition in alkaline solution, and then the microstructure, the element composition and the surface topography of CoWP films were characterized by XRD and FESEM equipped with EDX. The influence of the prepared conditions on microstructure and magnetic properties of CoWP films was mainly discussed, which the magnetic properties of CoWP films could be optimized with saturation magnetization of 85 emu/g and coercive force of 300 Oe. The results indicated W and P in the form of an amorphous phase enriched in the Co grain boundaries and the as-prepared CoWP films was mainly hcp Co phase with the diameter of 2-3 mu m. Furthermore, the exchange coupling effect was confirmed by the Henkel (deltaM) curve, which caused to the remanence enhancement.