title: Exchange bias and room-temperature magnetic order in molecular layers.
abstract: Molecular semiconductors may exhibit antiferromagnetic correlations well below room temperature. Although inorganic antiferromagnetic layers may exchange bias single-molecule magnets, the reciprocal effect of an antiferromagnetic molecular layer magnetically pinning an inorganic ferromagnetic layer through exchange bias has so far not been observed. We report on the magnetic interplay, extending beyond the interface, between a cobalt ferromagnetic layer and a paramagnetic organic manganese phthalocyanine (MnPc) layer. These ferromagnetic/organic interfaces are called spinterfaces because spin polarization arises on them. The robust magnetism of the Co/MnPc spinterface stabilizes antiferromagnetic ordering at room temperature within subsequent MnPc monolayers away from the interface. The inferred magnetic coupling strength is much larger than that found in similar bulk, thin or ultrathin systems. In addition, at lower temperature, the antiferromagnetic MnPc layer induces an exchange bias on the Co film, which is magnetically pinned. These findings create new routes towards designing organic spintronic devices.
authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess, BP 43 F-67034 Strasbourg Cedex 2, France.|Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Strasse 1 76131 Karlsruhe, Germany.
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authors.lastname: Gruber
authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess, BP 43 F-67034 Strasbourg Cedex 2, France.
authors.forename: Fatima
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authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess, BP 43 F-67034 Strasbourg Cedex 2, France.
authors.forename: Samy
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authors.affiliation: Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Strasse 1 76131 Karlsruhe, Germany.
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authors.lastname: Isshiki
authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess, BP 43 F-67034 Strasbourg Cedex 2, France.
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authors.affiliation: Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Strasse 1 76131 Karlsruhe, Germany.
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authors.lastname: Peter
authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess, BP 43 F-67034 Strasbourg Cedex 2, France.|Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin - BP 48, 91192 Gif-sur-Yvette, France.
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authors.lastname: Studniarek
authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess, BP 43 F-67034 Strasbourg Cedex 2, France.
authors.forename: Victor
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authors.lastname: Da Costa
authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess, BP 43 F-67034 Strasbourg Cedex 2, France.
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authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess, BP 43 F-67034 Strasbourg Cedex 2, France.|Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Strasse 1 76131 Karlsruhe, Germany.
authors.forename: Vincent
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authors.lastname: Davesne
authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess, BP 43 F-67034 Strasbourg Cedex 2, France.
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authors.affiliation: Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Strasse 1 76131 Karlsruhe, Germany.
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authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess, BP 43 F-67034 Strasbourg Cedex 2, France.
authors.forename: Jacek
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authors.lastname: Arabski
authors.affiliation: Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin - BP 48, 91192 Gif-sur-Yvette, France.
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authors.lastname: Otero
authors.affiliation: Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin - BP 48, 91192 Gif-sur-Yvette, France.
authors.forename: Fadi
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authors.lastname: Choueikani
authors.affiliation: Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin - BP 48, 91192 Gif-sur-Yvette, France.
authors.forename: Kai
authors.initials: K
authors.lastname: Chen
authors.affiliation: Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin - BP 48, 91192 Gif-sur-Yvette, France.
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authors.lastname: Ohresser
authors.affiliation: Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Strasse 1 76131 Karlsruhe, Germany.|Institute of Nanotechnology, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany.
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authors.initials: W
authors.lastname: Wulfhekel
authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess, BP 43 F-67034 Strasbourg Cedex 2, France.
authors.forename: Fabrice
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authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess, BP 43 F-67034 Strasbourg Cedex 2, France.
authors.forename: Wolfgang
authors.initials: W
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authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess, BP 43 F-67034 Strasbourg Cedex 2, France.
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authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess, BP 43 F-67034 Strasbourg Cedex 2, France.
authors.forename: Eric
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authors.lastname: Beaurepaire
authors.affiliation: Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess, BP 43 F-67034 Strasbourg Cedex 2, France.
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