Ultra High Density Perpendicular Magnetic Recording Technologies

Abstract

Perpendicular magnetic recording (PMR) has been investigated for ultra high density magnetic recording since 1977. The main problems affecting PMR are wide area data erasure, deterioration of the bit error rate (BER) due to noise from the soft magnetic underlayer (SUL), and the high media production cost of a thick SUL to secure an adequate BER at high… (More)

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