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Oscillations in Exchange Coupling in Co/Cu Multilayers Grown by MBE

Published online by Cambridge University Press:  03 September 2012

D. Greig ,
M.J. Hall ,
M.A. Howson ,
B.J. Hickey ,
M.J. Walker  and
J. Xu
D. Greig
Affiliation:
Department of Physics, University of Leeds, Leeds LS2 9JT, U.K.
M.J. Hall
Affiliation:
Department of Physics, University of Leeds, Leeds LS2 9JT, U.K.
M.A. Howson
Affiliation:
Department of Physics, University of Leeds, Leeds LS2 9JT, U.K.
B.J. Hickey
Affiliation:
Department of Physics, University of Leeds, Leeds LS2 9JT, U.K.
M.J. Walker
Affiliation:
Department of Physics, University of Leeds, Leeds LS2 9JT, U.K.
J. Xu
Affiliation:
Department of Physics, University of Leeds, Leeds LS2 9JT, U.K.
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Abstract

We have observed oscillations with non-Magnetic spacer layer thickness in the saturation fields and characteristic exchange fields of CO/Cu Multilayers grown by MBE. The Specimens consisted of a set of samples in which the thickness of copper layers took a series of values between 5Å and 20Å, while the cobalt layer thickness was set at 15Å throughout. The Multilayers were grown epitaxially on GaAs (110) with Ge, Co (110) and Au in the buffer region, resulting in CO/Cu bilayers in the (111) orientation. Although oscillations were observed in these magnetic measurements, no oscillations were observed in the magnetoresistance itself. These observations are somewhat at odds with similar measurements made on samples prepared by sputtering. We conclude with a discussion involving exchange coupling, in-plane anisotropy and defects in the magnetic structure in an attempt to account for these conflicting results.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 313: Symposium Q1 – Magnetic Ultrathin Films, Multilayers and Surfaces/Magnetic Interfaces-Physics and Characterizations , 1993 , 3
Copyright
Copyright © Materials Research Society 1993

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References

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