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Bilinear and Biquadratic Exchange Coupling in Fe(110)/Cr/Fe Trilayers

Published online by Cambridge University Press:  15 February 2011

H.J. Elmers ,
J. Schwabenhausen  and
T. Dürkop
H.J. Elmers
Affiliation:
Physikalisches Institut, Technische Universität Clausthal, 38678 Clausthal, Germany
J. Schwabenhausen
Affiliation:
Physikalisches Institut, Technische Universität Clausthal, 38678 Clausthal, Germany
T. Dürkop
Affiliation:
Physikalisches Institut, Technische Universität Clausthal, 38678 Clausthal, Germany
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Abstract

The indirect exchange coupling in W(110)/Fe/Cr/Fe/Cr trilayers was determined by analysis of magnetization curves measured by Kerr magnetometry. We adjusted the uniaxial in-plane anisotropies in the two Fe layers in such a way that the easy axes were orthogonal, [001] in the 1st, [110] in the 2nd layer. This allows an independent determination of both bilinear (i) and biquadratic (J2) coupling constants. We determined tJ and J2 as a function of Cr interlayer thickness (tcT = 0 – 4 nm), preparation temperature of the interlayer Tcr=100 – 500 K, and as a function of temperature (T = 100 – 300 K). Results for the exchange coupling are correlated to the particular lateral thickness fluctuation of the Cr spacer.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 475: Symposium M – Magnetic Ultrathin Films, Multilayers, and Surfaces – 1997 , 1997 , 605
Copyright
Copyright © Materials Research Society 1997

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References

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