MSR-RADとLand/Groove記録による高密度光磁気ディスク (<特集>磁気光学・光磁気記録)

概要

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Magnetically induced super-resolution (MSR) by rear aperture detection (RAD) is characterized by very low cross-talk and very high resolution due to the use of both front and rear masks within a laser spot. We investigated the possibility of making high-density magneto-optical disks that use RAD combined with land-groove recording with a 690-nm wavelength diode laser and a 0.55 NA objective lens. We achieved a bottom jitter of 8.4% in grooves and 9.5% on lands, and a recording power margin of ±16.5% in grooves and ±15.5% on lands at an areal density of 3.69 Gbit/in^2, with a 0.70-μm track pitch and a 0.25-μm bit length. These obtained values are acceptable for a magneto-optical disk system with a capacity of 5 GB/ 120mm or 2 GB/8 mm.
社団法人日本磁気学会の論文
1997-04-15