Orange Peel coupling in granular ferromagnetic films
arXiv:cond-mat/0307274 · doi:10.1103/PhysRevB.72.012413
Abstract
We present magnetoresistance (MR) measurements performed on magnetic tunnel junctions in which one of the electrodes is a granular ferromagnetic film. These junctions exhibit a zero field resistance dip. The dip magnitude depends on the size of the grains. We interpret these results as a consequence of the orange peel effect between the continuous ferromagnetic film and the magnetic grains. The coupling is found to be much stronger than that between continuous ferromagnetic layers.
4 pages and 3 figures