Eur. Phys. J. Appl. Phys.
Volume 39, Number 1, July 2007
|Page(s)||33 - 38|
|Section||Magnetism and Superconductivity|
|Published online||28 June 2007|
Multilevel magnetic nanodot arrays with out of plane anisotropy: the role of intra-dot magnetostatic coupling
DRFMC/SPINTEC (URA CEA/CNRS 2512), CEA Grenoble, 17 Av. Martyrs, 38054 Grenoble Cedex 9, France
2 Laboratoire de Physique des Solides (UMR CNRS 8502), Université Paris-Sud, 91405 Orsay, France
Corresponding author: email@example.com
Revised: 11 April 2007
Accepted: 16 May 2007
Published online: 28 June 2007
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.
PACS: 75 – Magnetic properties and materials / 75.70.-i – Magnetic properties of thin films, surfaces, and interfaces / 75.60.-d – Domain effects, magnetization curves, and hysteresis / 75.60.Ch – Domain walls and domain structure / 75.75.+a – Magnetic properties of nanostructures
© EDP Sciences, 2007
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