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Orientational Dependence of Oscillatory Exchange Coupling

Published online by Cambridge University Press:  03 September 2012

M.T. Johnson ,
P.J.H. Bloemen ,
R. Coehoorn ,
J.J. de Vries ,
N.W.E. McGee ,
W. R. Jungblut ,
A. Reinders  and
J. aan de Stegge
M.T. Johnson
Affiliation:
Philips Research, P.O. Box 80000, 5600 JA Eindhoven, The Netherlands.
P.J.H. Bloemen
Affiliation:
Physics Department, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.
R. Coehoorn
Affiliation:
Philips Research, P.O. Box 80000, 5600 JA Eindhoven, The Netherlands.
J.J. de Vries
Affiliation:
Physics Department, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.
N.W.E. McGee
Affiliation:
Philips Research, P.O. Box 80000, 5600 JA Eindhoven, The Netherlands.
W. R. Jungblut
Affiliation:
Philips Research, P.O. Box 80000, 5600 JA Eindhoven, The Netherlands.
A. Reinders
Affiliation:
Philips Research, P.O. Box 80000, 5600 JA Eindhoven, The Netherlands.
J. aan de Stegge
Affiliation:
Philips Research, P.O. Box 80000, 5600 JA Eindhoven, The Netherlands.
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Abstract

The role of the interlayer Fermi surface in driving oscillatory exchange coupling of ferromagnetic layers has been critically tested in a series of MBE-grown coherent epitaxial sandwiches prepared on single-crystal substrates. The wedge-shaped Cu (or Cu-based) interlayers have been modified in a number of different ways, achieving orientational, compositional and structural alteration of the Cu Fermi surface. Observed phenomena include multiperiodic coupling oscillations in both the ferromagnetically and antiferromagnetically coupled regions of (lOO) -oriented Co/Cu/Co samples, extended oscillatory periods across CuNi alloy interlayers, and extremely short-period oscillations in a bcc (100) Fe/Cu/Fe system. These phenomena are straightforwardly explained in terms of calculated Fermi surface variations.

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 , 93
Copyright
Copyright © Materials Research Society 1993

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References

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