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Reversal of Flux Closure States in Cobalt Nanoparticle Rings With Coaxial Magnetic Pulses

Authors

  • Takeshi Kasama,

    1. Frontier Research System Institute of Chemical and Physical Research Hatoyama, Saitama 350-0395 (Japan)
    2. Department of Materials Science and Metallurgy University of Cambridge Pembroke Street, Cambridge CB2 3QZ (UK)
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  • Rafal E. Dunin-Borkowski,

    1. Department of Materials Science and Metallurgy University of Cambridge Pembroke Street, Cambridge CB2 3QZ (UK)
    2. Center for Electron Nanoscopy Technical University of Denmark 2800 Kongens Lyngby (Denmark)
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  • Michael R. Scheinfein,

    1. Department of Physics Simon Fraser University Burnaby, BC V5A 1S6 (Canada)
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  • Steven L. Tripp,

    1. Department of Chemistry and Birck Nanotechnology Center Purdue University West Lafayette, IN 47907 (USA)
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  • Jie Liu,

    1. Department of Chemistry and Birck Nanotechnology Center Purdue University West Lafayette, IN 47907 (USA)
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  • Alexander Wei

    Corresponding author
    1. Department of Chemistry and Birck Nanotechnology Center Purdue University West Lafayette, IN 47907 (USA)
    • Department of Chemistry and Birck Nanotechnology Center Purdue University West Lafayette, IN 47907 (USA).
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  • We gratefully acknowledge the National Science Foundation (CHE- 0243496), the Defense Advanced Research Project Agency, and the Royal Society for financial support. Supporting Information is available online from Wiley InterScience or from the authors.

Abstract

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Bistable flux closure (FC) states in Co nanoparticle rings can be switched reversibly by applying a coaxial magnetic field (Hz). The FC switching phenomena can be reproduced by micromagnetics simulations, which also reveal novel magnetic states at intermediate applied field strengths.

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