Abstract
Readout characteristics were improved for Rear Expansion Detection (RED) magneto-optical media. Readout field margin of more than 60 Oe was obtained for marks written with light intensity modulation (LIM) and that of more than 100 Oe was obtained for marks written with laser pulse magnetic field modulation (LP-MFM). Retainable ghost signal appeared in tri-layer RED media was reduced by inserting an additional layer. Optimized RED media exhibited CNR of 44 dB at mark length of 0.2 μm.
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