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Amorphous Transition Metal-Rare Earth Alloy Films for Magneto-Optic Recording

Published online by Cambridge University Press:  26 February 2011

Fred E. Luborsky
Fred E. Luborsky*
Affiliation:
General Electric Corporate Research and Development, Schenectady NY 12301
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Abstract

This paper reviews the history of the development of films for use in magneto-optic recording. A discussion of why these early attempts with films of MnBi and Europium compounds were abandoned is given. The current work on amorphous transition metal-rare earth alloys is then reviewed. The origins of the necessary perpendicular magnetic anisotropy are discussed. The ideal combination of properties desired are: a high room temperature coercivity, a large temperature coefficient of coercivity, a large perpendicular anisotropy constant, large Ms, thermal and environmental stability, and, depending on whether a reflection or absorption mode of operation will be used, a large Kerr rotation with large reflectivity or a large Faraday rotation with a small specific absorption. These factors, their control, bow they influence the recording performance and the limits on performance of these amorphous films are discussed.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 80: Symposium G – Science and Technology of Rapidly Quenched Alloys , 1986 , 375
Copyright
Copyright © Materials Research Society 1987

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References

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