Micromagnetic Simulations of Discrete Track Media Consisting of Soft Magnetic Fillings

概要

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Discrete track media consisting of soft magnetic fillings were modelled. Using a recording head with practical dimensions, the groove permeability was varied from 1 to 100 to investigate the effect on the head field and head field gradient. As the groove permeability was increased, head fields in the groove were decreased, resulting in a significant increase in the field gradient. This phenomenon also occurred when side shields were attached to the recording head. The calculated head field distributions were used to record tracks on discrete track and granular media. Tracks recorded on media with soft magnetic fillings showed a significantly higher signal-to-noise ratio and narrower written track width than tracks recorded on a normal, granular medium.
2009-05-01