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Magnetic Order and Structure of Ultrathin Films and Multilayers

Published online by Cambridge University Press:  15 February 2011

G. Lugert ,
G. Bayreuther ,
S. Lehner ,
G. Gruber  and
P. Bruno
G. Lugert
Affiliation:
Institut für Angewandte Physik, Universität Regensburg, 8400 Regensburg, F.R.G.
G. Bayreuther
Affiliation:
Institut für Angewandte Physik, Universität Regensburg, 8400 Regensburg, F.R.G.
S. Lehner
Affiliation:
Institut für Angewandte Physik, Universität Regensburg, 8400 Regensburg, F.R.G.
G. Gruber
Affiliation:
Institut für Angewandte Physik, Universität Regensburg, 8400 Regensburg, F.R.G.
P. Bruno
Affiliation:
permanent address: I.E.F., Université Paris-Sud, Orsay, France
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Abstract

Ultrathin epitaxial films grown in UHV – Fe(110) on Au(111) and Ag(111), Co(0001) on Au(111) – , sputtered Fe films between Ag and sputtered Fe/Au multilayers were studied by SQUID magnetometry and Mössbauer spectroscopy (CEMS). It could be shown that the magnetic anisotropy relative to the film normal, the, ground state magnetic moment per Fe atom and thermal spin excitations are affected by the structure of the films. In particular, a more 3-dimensional growth mode in the early state of film formation which is observed except in a certain temperature range around 300 K reduces the apparent magnetic interface anisotropy and the ferromagnetic ground state moment, and it enhances the thermal spin fluctuations and the tendency for superparamagnetic relaxation in the thinnest films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 232: Symposium T – Magnetic Materials: Microstructure and Properties , 1991 , 97
Copyright
Copyright © Materials Research Society 1991

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References

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