• Author: Eltschka, M

    Universität Konstanz, Fachbereich Physik

  • Author: Klaui, M

    Universität Konstanz, Fachbereich Physik

  • Author: Rudiger, U

    Universität Konstanz, Fachbereich Physik

  • Author: Kasama, T

    University of Cambridge

  • Author: Gontard, Lionel Cervera

    Center for Electron Nanoscopy, Technical University of Denmark

  • Author: Dunin-Borkowski, Rafal E.

    Center for Electron Nanoscopy, Technical University of Denmark

  • Author: Luo, F

    Paul Scherrer Institute

  • Author: Heyderman, LJ

    Paul Scherrer Institute

  • Author: Jia, C-J

    Peking University, Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications and PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry

  • Author: Sun, L-D

    Peking University, Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications and PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry

  • Author: Yan, C-H

    Peking University, Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications and PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry

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The correlation between magnetic spin structure and geometry in nanoscale chemically synthesized Fe3O4 rings has been investigated by transmission electron microscopy. We find primarily the flux closure vortex states but in rings with thickness variations, an effective stray field occurs. Using tomography, we determine the complete three-dimensional geometries of thicker rings. A direct correlation between the geometry and the magnetization which points out of plane in the thickest parts of the ring yielding an intermediate magnetic state between the vortex state and the tube state is found. The interaction between exchange coupled rings leads to antiparallel vortex states and extended onion states. (c) 2008 American Institute of Physics.
Original languageEnglish
JournalApplied Physics Letters
Publication date2008
Volume92
Issue22
Pages222508
ISSN0003-6951
DOIs
StatePublished

Bibliographical note

Copyright (2008) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

CitationsWeb of Science® Times Cited: 2

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