Adhesion of CN Overcoat to CoPt-SiO Granular Magnetic Film

The tribological properties of the carbon nitride (CN ) coated CoPt-SiO granular films, especially the adhesion at the overcoat/magnetic layer interface, have been studied. Nanoscratch experiments and complementary scanning electron microscope (SEM) observations indicate that CN adheres more strongly to the SiO matrix than to the CoPt granules resulting in enhanced adhesion at the interface as a function of the SiO content in the CoPt-SiO layer.