Provided is a nonmagnetic material particle dispersed ferromagnetic material
sputtering target comprising a material including nonmagnetic material particles dispersed in a ferromagnetic material. The nonmagnetic material particle dispersed ferromagnetic material
sputtering target is characterized in that all particles of the nonmagnetic material with a structure observed on the material in its polished face have a shape and size that are smaller than all imaginary circles having a
radius of 2 μm formed around an arbitrary point within the nonmagnetic material particles, or that have at least two contact points or intersection points between the imaginary circles and the interface of the ferromagnetic material and the nonmagnetic material. The nonmagnetic material particle dispersed ferromagnetic material
sputtering target is advantageous in that, in the formation of a film by sputtering, the influence of heating or the like on a substrate can be reduced, high-speed deposition by DC sputtering is possible, the film thickness can be regulated to be thin, the generation of particles (dust) or nodules can be reduced during sputtering, the variation in quality can be reduced to improve the
mass productivity, fine
crystal grains and
high density can be realized, and the nonmagnetic material particle dispersed ferromagnetic material sputtering target is particularly best suited for use as a magnetic
recording layer.