Overwritable magnetooptical recording element including first an

Details Overwritable magnetooptical recording element including first an Overwritable magnetooptical recording element including first an

1990-08-23

1991-12-03

Levy, Stuart S.

Stock material or miscellaneous articles

Composite

Of inorganic material

365122, 369288, 369 13, G11B 1100

Patent

active

050699849

ABSTRACT:
A multilayer, direct-overwrite, magnetooptic recording element comprises first and second layers of magnetic materials having different magnetic coercivities and Curie temperatures. According to the invention, one of the two magnetic layers is doped with zirconium. The addition of zirconium has the effect of substantially lowering the Curie temperature of the doped layer, thereby enlarging the Curie temperature differential between the magnetic layers. The zirconium additive also has the effect of stabilizing the magnetic properties of the doped layer.

REFERENCES:
patent: 4992338 (1991-02-01), Hatwar et al.
Majumdar et al, "Effects of Pt and Zr on the Oxidation behavior of FeTbCo Magneto-Optic Felius: X-Ray Photoelectron Spectroscopy", J. Vac. Sci. tech. vol. A7(4), Jul./Aug. 1989, pp. 2673-2677.

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