The nature of recorded magnetisation transitions in thin film media

The longitudinal components of the recorded magnetisations in a number of t hin film disk media were determined from captured isolated replay pulses us ing inverse filtering techniques. The computed magnetisations exhibit asymm etry in the tails in the approach to saturation. These recovered magnetisat ion transitions and their derivatives were linearly superposed to investiga te the persistence of recorded magnetisation with recording density. Furthe rmore, the recovered magnetisation distributions were employed to investiga te the effect of transition shape on the noise power spectral densities. Th e results are compared with experimental observations. (C) 1999 Elsevier Sc ience B.V. All rights reserved.