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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

1. Hartmann, M., Jacobs, B. A. J. and Braat, J. J. M., Philips Techn. Rev. 42, 37 (1985).Google Scholar
2. See for example, articles on metal superlattices and references in Synthetic Modulated Structures, edited by Chang, L. L. and Giessen, B. C. (Academic, Orlando, FL, 1985).Google Scholar
3. Zeper, W. B., Greidanus, F. J. A. M., Carcia, P. F. and Fincher, C. R., to be published in J. Appl. Phys.Google Scholar
4. Greidanus, F. J. A. M., Zeper, W. B., den Broeder, F. J. A., Godlieb, W. F. and Carcia, P. F., to be published in Appl. Phys. Lett.Google Scholar
5. Gomi, M., Satoh, K. and Abe, M., J. Appl. Phys. 63, 3642 (1988).Google Scholar
6. Draaisma, H. J. G., den Broeder, F. J. A. and de Jonge, W. J. M., J. Magn. Mater. 66, 351 (1987).Google Scholar