Abstract
Media noise of perpendicular magnetic recording media was investigated by statistical approach. An analysis in association with a Lorentzian correlation function and a numerical simulation with Voronoi cell modeling were used. A proportional relation between cluster size and noise voltage was confimed in contrast to a calculation considering cross-track correlation length only that shows less dependency. Size variation of the clusters increased noise voltage. Fine fluctuation of transition line was dramatically suppressed by averaging effect of finite readback track width, therefore, experimental result of the relatively large cluster size was considered to be caused by some real magnetic irregularity.
