Orange Peel coupling in granular ferromagnetic films

Details Orange Peel coupling in granular ferromagnetic films Orange Peel coupling in granular ferromagnetic films

2003-07-11

arxiv.org/abs/cond-mat/0307274v1

Phys. Rev. B72, 012413 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages and 3 figures

Scientific paper

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.

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