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Blocking of Magnetic Long Range Order Between the Monolayer and the Double Layer of Fe(110) on W(110)

Published online by Cambridge University Press:  15 February 2011

Hans-Joachim Elmers ,
Jens Hauschild ,
Guohui Liu ,
Helmut Fritzsche ,
Ulrich KÖhler  and
Ulrich Gradmann
Hans-Joachim Elmers
Affiliation:
Physikalisches Institut, Technische Universität Clausthal, D 38678 Clausthal-Zellerfeld
Jens Hauschild
Affiliation:
Physikalisches Institut, Technische Universität Clausthal, D 38678 Clausthal-Zellerfeld
Guohui Liu
Affiliation:
Physikalisches Institut, Technische Universität Clausthal, D 38678 Clausthal-Zellerfeld
Helmut Fritzsche
Affiliation:
Physikalisches Institut, Technische Universität Clausthal, D 38678 Clausthal-Zellerfeld
Ulrich KÖhler
Affiliation:
Institut für Experimentalphysik, Universität Kiel, D 24098 Kiel, Germany
Ulrich Gradmann
Affiliation:
Physikalisches Institut, Technische Universität Clausthal, D 38678 Clausthal-Zellerfeld
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Abstract

In extension of a recent study on submonolayer magnetism of Fe(110) on W(110) [1], we observed the interplay of morphology and magnetic order in Fe(110)-films prepared on W(110) at 300 K, in a range of coverages θ between the pseudomorphic monolayer (θ = 1) and the pseudomorphic double layer (θ = 2), using a combination of STM, SPLEED, CEMS and TOM. Whereas the Curie-temperatures of the monolayer and the double layer are given by Tc(ML) = 230K and Tc(DL) = 450K, respectively, we observe in an interval of 1.20< θ < 1.48 ML a gap of magnetic long range order, for temperatures down to 115K. In CEMS, we observe superparamagnetic fluctuations for T < Tc(ML), but magnetic short range order for T < Tc(ML). The surprising blocking of long range order in the gap can only be explained from a quasi-antiferromagnetic indirect coupling between double-layer islands.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 384: Symposium L – Magnetic Ultrathin films, Multilayers and Surfaces , 1995 , 157
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

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