Recording characteristics of a magneto-optical super-resolution disk

Junji Hirokane; Yoshiteru Murakami; H. Katayama; Akira Takahashi; Kenji Ohta; Hideyoshi Yamaoka

doi:10.1117/12.190198

12 October 1994 Recording characteristics of a magneto-optical super-resolution disk

Junji Hirokane, Yoshiteru Murakami, H. Katayama, Akira Takahashi, Kenji Ohta, Hideyoshi Yamaoka

Proceedings Volume 2338, 1994 Topical Meeting on Optical Data Storage; (1994) https://doi.org/10.1117/12.190198
Event: Optical Data Storage '94, 1994, Dana Point, CA, United States

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.

Citation Download Citation

Junji Hirokane, Yoshiteru Murakami, H. Katayama, Akira Takahashi, Kenji Ohta, and Hideyoshi Yamaoka "Recording characteristics of a magneto-optical super-resolution disk", Proc. SPIE 2338, 1994 Topical Meeting on Optical Data Storage, (12 October 1994); https://doi.org/10.1117/12.190198

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