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Morphology and Curie Temperature Changes upon Annealing of Co/W(110)

Published online by Cambridge University Press:  10 February 2011

A. Bauer ,
A. Mühlig ,
T. Günther ,
M. Farle ,
K. Baberschke  and
G. Kaindl
A. Bauer
Affiliation:
Institut für Experimentalphysik, Freie Universität Berlin, D-14195 Berlin, Germany, bauer@physik.fu-berlin.de
A. Mühlig
Affiliation:
Institut für Experimentalphysik, Freie Universität Berlin, D-14195 Berlin, Germany, bauer@physik.fu-berlin.de
T. Günther
Affiliation:
Institut für Experimentalphysik, Freie Universität Berlin, D-14195 Berlin, Germany, bauer@physik.fu-berlin.de
M. Farle
Affiliation:
Institut für Experimentalphysik, Freie Universität Berlin, D-14195 Berlin, Germany, bauer@physik.fu-berlin.de
K. Baberschke
Affiliation:
Institut für Experimentalphysik, Freie Universität Berlin, D-14195 Berlin, Germany, bauer@physik.fu-berlin.de
G. Kaindl
Affiliation:
Institut für Experimentalphysik, Freie Universität Berlin, D-14195 Berlin, Germany, bauer@physik.fu-berlin.de
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Abstract

Annealing of CoAV(110) ultrathin films causes rather strong changes of film morphology and magnetic properties, which has been studied by scanning tunneling microscopy (STM) and alternating-current magneto-optical Kerr effect (ac-MOKE). Annealing above 500 K of room-temperature grown 2 monolayers (ML) thick Co/W(110) films leads to the formation of islands and a decrease of the Curie temperature 7C. At 4 ML, on the other hand, a network of interconnected islands is formed upon annealing, resulting in an enhanced TC. While the increase of TC at 4 ML is explained by an increase of the local film thickness, the anomalous TC behavior at 2 ML is assigned to the occurrence of superparamagnetism.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 475: Symposium M – Magnetic Ultrathin Films, Multilayers, and Surfaces – 1997 , 1997 , 27
Copyright
Copyright © Materials Research Society 1997

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References

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