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Proceedings Paper

Ultrathin Co/Pt and Co/Pd new magneto-optical recording media
Author(s): Shunichi Hashimoto; Hideki Matsuda; Yoshitaka Ochiai
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Paper Abstract

Co/Pt and Co/Pd multilayers were prepared by two source dc-magnetron sputtering. Magneto-optical properties of these multilayers were affected by total film thickness, and a perfect squareness of Kerr loop and an enhancement of Kerr rotation angle weresimultaneously achieved when the film thickness was below several hundred angstroms. The improvement of Kerr remanence ratio can be explained by the change in domain structure from a stripe domain to a single domain, d the enhancement of Kerr rotation is due to the optical interference effect with the multiple reflection. The ultrathin films have high corrosion resistance, large Kerr rotation and strong perpendicular magnetic anisotropy even in very thin film thickness. A hermomagnetic writing was successfully made in the magneto-optical disks using these ultrathin media,and the C/N ratio showed 53 dB and 46 dB for Co/Pt and Co/Pd disks,respectively.The figure of merit becomes larger at shorter wavelength, and thus the ultrathin multilayers can be new promising magneto-optical recording media, especially for higher density recording using a shorter wavelength laser.

Paper Details

Date Published: 1 August 1990
PDF: 13 pages
Proc. SPIE 1248, Storage and Retrieval Systems and Applications, (1 August 1990); doi: 10.1117/12.19627
Show Author Affiliations
Shunichi Hashimoto, Sony Corp. (Japan)
Hideki Matsuda, Sony Corp. (Japan)
Yoshitaka Ochiai, Sony Corp. (Japan)

Published in SPIE Proceedings Vol. 1248:
Storage and Retrieval Systems and Applications
David H. Davies; Han-Ping D. Shieh, Editor(s)

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