Abstract

Perpendicular magnetic recording (PMR) system using a single-pole writer and a double-layered perpendicular recording medium with a soft underlayer (SUL) is a promising candidate for high recording densities of over 100 Gb/in/sup 2/. The relationships between medium characteristics and recording performance have been studied. In this paper, we have clarified the dependency of the write-field gradient on the transition width using by a micromagnetic modeling. Also, the dependence of medium parameters is also discussed in the paper.

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