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Valence Instability and Magnetic Polarization of Ce Atoms near the Interface of Ce/Fe Multilayers Studied by Magnetic Circular X-Ray Dichroism.

Published online by Cambridge University Press:  03 September 2012

F. Klose ,
S. Pizzini ,
C. Giorgetti ,
O. Schulte ,
F. Baudelet ,
E. Dartyge ,
G. Krill ,
W. Felsch  and
A. Fontaine
F. Klose
Affiliation:
I. Physikalisches Institut, Universität Gottingen, Bunsenstr. 9. 3400 Gottingen, Germany
S. Pizzini
Affiliation:
LURE. Bâtiment 209D, Université Paris-Sud, 91405 Orsay, France
C. Giorgetti
Affiliation:
LURE. Bâtiment 209D, Université Paris-Sud, 91405 Orsay, France
O. Schulte
Affiliation:
LURE. Bâtiment 209D, Université Paris-Sud, 91405 Orsay, France
F. Baudelet
Affiliation:
LURE. Bâtiment 209D, Université Paris-Sud, 91405 Orsay, France
E. Dartyge
Affiliation:
LURE. Bâtiment 209D, Université Paris-Sud, 91405 Orsay, France
G. Krill
Affiliation:
LURE. Bâtiment 209D, Université Paris-Sud, 91405 Orsay, France
W. Felsch
Affiliation:
I. Physikalisches Institut, Universität Gottingen, Bunsenstr. 9. 3400 Gottingen, Germany
A. Fontaine
Affiliation:
LURE. Bâtiment 209D, Université Paris-Sud, 91405 Orsay, France
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Abstract

An experimental study of conventional x-ray absorption and of magnetic circular x-ray dichroism has been performed on Ce/Fe Multilayers at the Ce L2,3 and the Fe-K edge, to characterize the impact of the interaction of Ce and Fe on the local electronic and magnetic structure of the interface. The spectra reveal that the interaction has two effects. First, on a depth scale of up to 15 A near the interface, the Ce atoms adopt the electronic structure of the oc-phase, with itinerant 4f states. Second, a large portion (=10 Å) of these cc-like Ce atoms is magnetically polarized and carries an ordered Magnetic 5d Moment. The Fe-3d and Ce-5d Moments are antiferromagnetically coupled. Interface Mixing on a length scale of the magnetic polarization can be excluded.

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 , 811
Copyright
Copyright © Materials Research Society 1993

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References

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