Domain duplication in magnetic tunnel junctions studied by Kerr microscopy- art. no. 052409

Magneto-optic measurements have been performed to study the magnetic respon se of Co/Al2O3/Co tunnel junctions with the aim to show the domain duplicat ion of the hard magnetic layer into the soft magnetic layer. The magnetizat ion reversals of the hard and the soft layer have been studied separately a nd their ferromagnetic coupling is shown when combined in a tunnel junction . Features appearing in the variation of tunnel resistance as a function of applied field are associated to the domain phase evolution of each electro de and a deep understanding of the domain duplication is given.