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Optimization of heads for perpendicular recording

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4 Author(s)
Shute, H.A. ; Centre for Res. in Inf. Storage Technol., Univ. of Plymouth, UK ; Miles, J.J. ; Wilton, D.T. ; Mapps, D.J.

The effects of gap length, head-underlayer separation, and return pole potential on the magnitude and direction of the field of a gapped head are investigated using an analytic two-dimensional model. Criteria derived from a micromagnetic model of a perpendicular recording medium are used to optimize the head geometry for various media parameters. A head with a gap length which is at most 2.5 times the head-medium separation can write on higher coercivity media than a single pole.

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Magnetics, IEEE Transactions on  (Volume:38 ,  Issue: 5 )