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Pt/Co Multilayers - A New Magneto-Optical Recording Medium

Published online by Cambridge University Press:  21 February 2011

P. F. Carcia ,
W. B. Zeper  and
F. J. A. M. Greidanus
P. F. Carcia
Affiliation:
E. I. du Pont de Nemours and Co., Experimental Station, PO Box 80356, Wilmington, DE 19880-0356;
W. B. Zeper
Affiliation:
Philips Research Laboratories, P.O. Box 80.000, 5600 JA Eindhoven, The Netherlands.
F. J. A. M. Greidanus
Affiliation:
Philips Research Laboratories, P.O. Box 80.000, 5600 JA Eindhoven, The Netherlands.
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Abstract

This paper discusses the magnetic and magneto-optical properties of Pt/Co multilayers, which we propose are an attractive candidate for a magneto-optical storage medium. Thin films, prepared by electron beam evaporation, have an easy axis of magnetization perpendicular to the film plane, a square magnetic hysteresis loop, and a coercivity of ∼1 kOe, when the individual Co layers are less than 4 A thick. The polar Kerr rotation, θK, is a modest 0.1–0.2° at 820 nm, but a large optical reflectivity is responsible for a good figure of merit. Further, θK for Pt/Co multilayers increases at shorter wavelengths, where higher storage densities are possible. Initial results of thermomagnetic writing on these layers are presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 150: Symposium F – Materials for Magneto-Optic Data Storage , 1989 , 115
Copyright
Copyright © Materials Research Society 1989

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References

REFERENCES

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