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

作者：Blouzon C^*; Ott F; Tortech L; Fichou D; Moussy J B

来源：Applied Physics Letters, 2013, 103(4): 042417.

DOI：10.1063/1.4816954

We report here on the magnetic coupling taking place between Fe3O4 and Co layers across an organic monolayer of alpha-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.

• 出版日期2013-7-22
• 单位中国地震局