Anti-ferromagnetic coupling in hybrid magnetic tunnel junctions mediated by monomolecular layers of α-sexithiophene

Abstract : We report here on the magnetic coupling taking place between Fe3O4 and Co layers across an organic monolayer of α-sexithiophene (6T). The controlled growth of 6T ultrathin films on epitaxial Fe3O4 surfaces allows to prepare highly homogeneous insulating layers with thicknesses in the range 0.5–2.0 monolayers (ML). A combined study using vibrating sample magnetometry and polarized neutron reflectivity reveals that hybrid Fe3O4/6T/Co tunnel junctions show different magnetic couplings depending on the 6T thickness. In particular, magnetic coupling between Fe3O4 and Co layers separated by 1 ML of 6T is consistent with anti-ferromagnetic coupling, opening new perspectives for controlling magnetization in organic spintronic devices.
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Article dans une revue
Applied Physics Letters, American Institute of Physics, 2013, 103 (4), pp.042417. 〈10.1063/1.4816954〉
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https://hal-cea.archives-ouvertes.fr/cea-01481044
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Soumis le : jeudi 2 mars 2017 - 10:41:00
Dernière modification le : jeudi 11 janvier 2018 - 06:27:30

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C. Blouzon, F. Ott, L. Tortech, D. Fichou, J.-B. Moussy. Anti-ferromagnetic coupling in hybrid magnetic tunnel junctions mediated by monomolecular layers of α-sexithiophene. Applied Physics Letters, American Institute of Physics, 2013, 103 (4), pp.042417. 〈10.1063/1.4816954〉. 〈cea-01481044〉

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