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Magnetic Properties of Thin Eu Films on Gd(0001) Studied by Magnetic Circular Dichroism in Photoemission

Published online by Cambridge University Press:  15 February 2011

E. Arenholz ,
K. Starke  and
G. Kaindl
E. Arenholz
Affiliation:
Institut für Experimentalphysik, Freie Universität Berlin, D-14195 Berlin, Germany, [email protected]
K. Starke
Affiliation:
Institut für Experimentalphysik, Freie Universität Berlin, D-14195 Berlin, Germany, [email protected]
G. Kaindl
Affiliation:
Institut für Experimentalphysik, Freie Universität Berlin, D-14195 Berlin, Germany, [email protected]
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Abstract

The magnetic order of ultra-thin Eu films on Gd(0001) was studied in an element-specific and layer-resolved way using magnetic circular dichroism (MCD) in 4ƒphotoemission (PE). It was found that Eu films up to 2 monolayers (ML) exhibit a high net magnetization parallel to that of the Gd substrate. For Eu coverages exceeding 2 ML, the ferromagnetic alignment of the Eu moments breaks down, except for the Eu interface layer. A comparison of the temperature dependences of the Eu-4/ and Gd-4/ MCD-PE signals for 1-ML-Eu/Gd(0001) with the results of a layer-resolved mean-field calculation results in values for the exchange-coupling constants within the Eu monolayer as well as between Eu and the Gd substrate.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 475: Symposium M – Magnetic Ultrathin Films, Multilayers, and Surfaces – 1997 , 1997 , 487
Copyright
Copyright © Materials Research Society 1997

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References

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