Recording characteristics of a magneto-optical super-resolution disk

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Abstract
To reduce recording magnetic field of a magneto-optical super-resolution disk which uses an in-plane magnetization readout layer, we developed a new disk structure. By preparing a DyFeCo intermediate layer between the readout layer and the recording layer, the recording magnetic field was greatly reduced and then both super-resolution readout and mark-edge recording by a magnetic field modulation method were achieved. By using the new triple-layered disk for super-resolution readout, a carrier to noise ratio of 45 dB at a 0.4 micrometers mark length was obtained and the recording magnetic field became 15 kA/m.

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