Abstract
We report a study of interlayer exchange interaction in multilayer [Co/Pt]n/Pt/Co structures. The structures consist of a periodic [Co/Pt]n multilayer film with a perpendicular anisotropy and a thick Co layer with an in-plane anisotropy. The subsystems are separated by a Pt spacer with variable thickness. The magnetooptical Kerr effect and the ferromagnetic resonance measurements show the essentially non-collinear state of magnetic moments of the layers and strong exchange coupling between the [Co/Pt]n and the Co subsystems. A simple model based on the Landau-Lifshitz-Gilbert equation shows that the exchange coupling is ferromagnetic. The exchange constant is estimated in this simple model. The estimated value is J=2 erg/cm2.
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