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Intercalation-Driven Reversible Control of Magnetism in Bulk Ferromagnets

Authors

  • Subho Dasgupta,

    Corresponding author
    1. Institute for Nanotechnology, Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
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  • Bijoy Das,

    1. Institute for Nanotechnology, Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
    2. Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU), Ulm, Germany
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  • Michael Knapp,

    1. Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU), Ulm, Germany
    2. Institute for Applied Materials (IAM), Karlsruhe Institute of Technology (KIT), Eggenstein Leopoldshafen, Germany
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  • Richard. A. Brand,

    1. Institute for Nanotechnology, Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
    2. Department of Physics, Universität Duisburg-Essen, Duisburg, Germany
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  • Helmut Ehrenberg,

    1. Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU), Ulm, Germany
    2. Institute for Applied Materials (IAM), Karlsruhe Institute of Technology (KIT), Eggenstein Leopoldshafen, Germany
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  • Robert Kruk,

    1. Institute for Nanotechnology, Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
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  • Horst Hahn

    1. Institute for Nanotechnology, Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
    2. Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU), Ulm, Germany
    3. KIT-TUD Joint Research Laboratory Nanomaterials, Technische Universität Darmstadt (TUD), Institute of Materials Science, Darmstadt, Germany
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Abstract

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An extension in magnetoelectric effects is proposed to include reversible chemistry-controlled magnetization variations. This ion-intercalation-driven magnetic control can be fully reversible and pertinent to bulk material volumes. The concept is demonstrated for ferromagnetic iron oxide where the intercalated lithium ions cause valence change and partial redistribution of Fe3+ cations yielding a large and fully reversible change in magnetization at room temperature.

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