Medium Noise in Longitudinal Thin Film Disk Media above 20 Gb/in_2

摘要

Medium noise is the dominant noise in ultra- high density disk recording systems. The peak, width and jitter- noise are analyzed by micromagnetic simulations. Four different media, with a fixed grain size of 135A and a coercivity of 2900 Oe, are chosen for medium noise analysis. The linear recording density is increased from 340 KFCI (Kilo flux-changes per inch) to 750KFCI, while the area density goes up from 14.3Gb/in!2 to 31.5Gb/in~2.