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Structural and Magnetoresistance Properties of Co/Cu Multilayers Doped with Fe

Published online by Cambridge University Press:  03 September 2012

J.M. George ,
A. Barthelemy ,
O. Durand ,
J. L. Duvail ,
A. Fert ,
P. Galtffir ,
O. Heckmann ,
L.G. Pereira ,
F. Petroff  and
T. Valet
J.M. George
Affiliation:
Laboratoire de Physique des Solides, Université Paris-Sud, 91405 Orsay, France
A. Barthelemy
Affiliation:
Laboratoire de Physique des Solides, Université Paris-Sud, 91405 Orsay, France
O. Durand
Affiliation:
Laboratoire Central de Recherches, Thomson CSF, 91404 Orsay, France
J. L. Duvail
Affiliation:
Laboratoire de Physique des Solides, Université Paris-Sud, 91405 Orsay, France
A. Fert
Affiliation:
Laboratoire de Physique des Solides, Université Paris-Sud, 91405 Orsay, France
P. Galtffir
Affiliation:
Laboratoire Central de Recherches, Thomson CSF, 91404 Orsay, France
O. Heckmann
Affiliation:
Laboratoire pour l'Utilisation du Rayonnement Electromagnétique, Université Paris-Sud, 91405 Orsay, France
L.G. Pereira
Affiliation:
Laboratoire de Physique des Solides, Université Paris-Sud, 91405 Orsay, France
F. Petroff
Affiliation:
Laboratoire de Physique des Solides, Université Paris-Sud, 91405 Orsay, France
T. Valet
Affiliation:
Laboratoire Central de Recherches, Thomson CSF, 91404 Orsay, France
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Abstract

We have studied the influence of ultra-thin interfacial Fe layers on the structural and magnetoresistance properties of CO/Cu Multilayers. Our results show that the giant magnetoresistance arises from spin dependent scattering at the CO/Cu interfaces and in the bulk of Co, the interfacial contribution being predominant. We also demonstrate that the close-packed crystallographic structure of Co and Cu is very sensitive to the insertion of interfacial bec Fe layers: for small thicknesses, Co as well as Cu adopt a metastable bec structure.

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References

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