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Proceedings Paper

Magneto-Optical Disk With Reflecting Layers
Author(s): K. Ohta; A. Takahashi; T. Deguchi; T. Hyuga; S. Kobayashi; H. Yamaoka
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Paper Abstract

The magneto-optical rotation (MOR) of amorphous rare earth-iron thin films with reflecting layers and the characteristics of magneto-optical disc exerciser are described. The MOR of GdTbFe thin films increased from 0.27° to 0.5° by the addition of Cu reflector , and to 0.65° by supplementing an SiO2 intermediate film upon the Cu reflector. Furthermore in the case of a quadri-layer structure, which consisted of SiO, GdTbDyFe, SiO2 and Cu layers, the angle of rotation was augmented to 1.75°. The Magneto-optical disc player, making use of the above quadri-layer structure disc, attained a carrier-to-noise ratio (CNR) of 40 dB at 2 MHz, thereby proving the applicability of the equipment to digital file memory systems.

Paper Details

Date Published: 1 January 1983
PDF: 8 pages
Proc. SPIE 0382, Optical Data Storage, (1 January 1983); doi: 10.1117/12.970211
Show Author Affiliations
K. Ohta, Sharp Corporation (Japan)
A. Takahashi, Sharp Corporation (Japan)
T. Deguchi, Sharp Corporation (Japan)
T. Hyuga, Sharp Corporation (Japan)
S. Kobayashi, Sharp Corporation (Japan)
H. Yamaoka, Sharp Corporation (Japan)

Published in SPIE Proceedings Vol. 0382:
Optical Data Storage
Di Chen, Editor(s)

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