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Epitaxial Co-Cu Superlattices

Published online by Cambridge University Press:  26 February 2011

Elizabeth Schuler ,
Sezai Elagoz ,
William Vavra ,
Frank Lamelas ,
Hui David He  and
Roy Clarke
Elizabeth Schuler
Affiliation:
University of Michigan, Dept. of Physics, Ann Arbor MI 48109
Sezai Elagoz
Affiliation:
University of Michigan, Dept. of Physics, Ann Arbor MI 48109
William Vavra
Affiliation:
University of Michigan, Dept. of Physics, Ann Arbor MI 48109
Frank Lamelas
Affiliation:
AT&T Bell Laboratories, 600 Mountain Ave., Murray Hill NJ 07974
Hui David He
Affiliation:
University of Minnesota, Dept. of Electrical Engineering, Minneapolis MN 55455
Roy Clarke
Affiliation:
University of Michigan, Dept. of Physics, Ann Arbor MI 48109
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Abstract

We describe measurements on the magnetic properties of Co-Cu superlattices in which the Co layer thickness was fixed at 20 Å and the Cu thickness was varied from 4 Å to 24 Å. The samples were grown on Ge-buffered (110) GaAs by molecular beam epitaxy. X-ray scattering and in-situ RHEED indicate that the multilayers are oriented in the (111) direction with the Co layers stacked in an fcc arrangement. Our interest in this series of samples lies in their unusual hysteresis curves which show distinct transitions. We have found that the appearance of these transitions is directly related to the Cu thickness, indicating the presence of complex spin configurations as a consequence of competing interactions. The results are not consistent with a simple RKKY antiferromagnetic coupling.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 231: Symposium S – Magnetic Surfaces, Thin Films and Multilayers , 1991 , 235
Copyright
Copyright © Materials Research Society 1992

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References

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