DRFMC/SPINTEC (URA CEA/CNRS 2512), CEA Grenoble, 17 Av. Martyrs, 38054 Grenoble Cedex 9, France
Laboratoire de Physique des Solides (UMR CNRS 8502), Université Paris-Sud, 91405 Orsay, France
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.
(Received January 12 2007)
(Revised April 11 2007)
(Accepted May 16 2007)
(Online publication June 28 2007)