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Magnetic-Instability-Induced Giant Magnetoelectric Coupling

Authors

  • Ponniah Ravindran,

    Corresponding author
    1. Center for Materials Science and Nanotechnology Department of Chemistry University of Oslo P.O. Box 1033 Blindern, 0315 Oslo (Norway)
    • Center for Materials Science and Nanotechnology Department of Chemistry University of Oslo P.O. Box 1033 Blindern, 0315 Oslo (Norway).
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  • Ravindran Vidya,

    Corresponding author
    1. Center for Materials Science and Nanotechnology Department of Chemistry University of Oslo P.O. Box 1033 Blindern, 0315 Oslo (Norway)
    • Center for Materials Science and Nanotechnology Department of Chemistry University of Oslo P.O. Box 1033 Blindern, 0315 Oslo (Norway).
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  • Olle Eriksson,

    1. Department of Physics Uppsala University P.O. Box 530, 751 21 Uppsala (Sweden)
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  • Helmer Fjellvåg

    1. Center for Materials Science and Nanotechnology Department of Chemistry University of Oslo P.O. Box 1033 Blindern, 0315 Oslo (Norway)
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  • This work has received financial and supercomputing support from the Research Council of Norway within FUNMAT and NANOMAT projects.

Abstract

original image

Multifunctional materials such as mag netoelect rics can be used in novel device applications. Magnetism and ferroelectricity coexist in some materials, but the coupling between them is very small to use them in devices. Using density function al calculations we have shown that BiCoO3 (see figure) has large magneto-electric coupling owing to metamagnetism arising from a spin state transition of cobalt ion.

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