https://doi.org/10.1051/epjap:2007107
Multilevel magnetic nanodot arrays with out of plane anisotropy: the role of intra-dot magnetostatic coupling
1
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: v.a.baltz@leeds.ac.uk
Received:
12
January
2007
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
