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Magneto-Optical Properties of Ni-MgO and Co-MgO Nanocomposite Films Obtained by Partial Reduction Reactions

Published online by Cambridge University Press:  10 February 2011

J. A. Smith ,
P. Limthongkul ,
L. Hartsuyker ,
S. Y. Kim  and
S. L. Sass
J. A. Smith
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853
P. Limthongkul
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853
L. Hartsuyker
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853
S. Y. Kim
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853
S. L. Sass
Affiliation:
Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853
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Abstract

A new processing technique was developed to synthesize metal-ceramic films containing nano-sized Ni or Co particles embedded in a MgO matrix. Sol-gel solutions were spun on different substrates with varying coefficients of thermal expansion, oxidized by heating in air and reduced to form a metal-ceramic two phase mixture. This method allows the generation of perpendicular magnetic anisotropy by use of residual stresses arising from a coefficient of thermal expansion difference between the film and substrate. Magneto-optical measurements show that the films can have relatively large Kerr and Faraday rotations, and that the metal particles have sufficient vertical magnetic anisotropy to support perpendicular magnetization. The magneto-optical properties of the films are related to the metal particle size, film thickness and substrate choice.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 475: Symposium M – Magnetic Ultrathin Films, Multilayers, and Surfaces – 1997 , 1997 , 245
Copyright
Copyright © Materials Research Society 1997

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References

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