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Multilevel magnetic nanodot arrays with out of plane anisotropy: the role of intra-dot magnetostatic coupling

Published online by Cambridge University Press:  28 June 2007

V. Baltz ,
A. Bollero ,
B. Rodmacq ,
B. Dieny ,
J.-P. Jamet  and
J. Ferré
V. Baltz*
Affiliation:
DRFMC/SPINTEC (URA CEA/CNRS 2512), CEA Grenoble, 17 Av. Martyrs, 38054 Grenoble Cedex 9, France
A. Bollero
Affiliation:
DRFMC/SPINTEC (URA CEA/CNRS 2512), CEA Grenoble, 17 Av. Martyrs, 38054 Grenoble Cedex 9, France
B. Rodmacq
Affiliation:
DRFMC/SPINTEC (URA CEA/CNRS 2512), CEA Grenoble, 17 Av. Martyrs, 38054 Grenoble Cedex 9, France
B. Dieny
Affiliation:
DRFMC/SPINTEC (URA CEA/CNRS 2512), CEA Grenoble, 17 Av. Martyrs, 38054 Grenoble Cedex 9, France
J.-P. Jamet
Affiliation:
Laboratoire de Physique des Solides (UMR CNRS 8502), Université Paris-Sud, 91405 Orsay, France
J. Ferré
Affiliation:
Laboratoire de Physique des Solides (UMR CNRS 8502), Université Paris-Sud, 91405 Orsay, France
*
v.a.baltz@leeds.ac.uk
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Abstract

Intra-dot inter-layer magnetostatic coupling have been investigated in trilayers which consist of two [Co/Pt] multilayers with out-of-plane anisotropy and different coercivities separated by a thick Pt layer. For single domain nanodots, the strong intra-dot inter-layer magnetostatic interactions manifest as a shift of the soft layer hysteresis loop. The amplitude of this shift decreases when the size of the dots is increased and/or when the temperature is increased. Satisfactory agreement is found between calculations and experimental results.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 39 , Issue 1 , July 2007 , pp. 33 - 38
Copyright
© EDP Sciences, 2007

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