Abstract
Ion beam sputtering is used for elaborating ferromagnetic Co/Al 2O 3/Co/NiFe multilayers. The interface state and the roughness of the multilayer are examined by TEM and AFM. The insulating layer is found to be homogenous with a low RMS roughness. Magnetic properties of each electrode and of the full stack are studied by P-MOKE and AGFM. The magnetic behaviour of the full stack is characteristic of two switching fields with a Néel coupling.
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