Three-dimensional observation of magnetic vortex cores in stacked ferromagnetic discs

Toshiaki Tanigaki, Yoshio Takahashi, Tomokazu Shimakura, Tetsuya Akashi, Ruriko Tsuneta, Akira Sugawara, Daisuke Shindo

    Research output: Contribution to journalArticlepeer-review

    63 Citations (Scopus)

    Abstract

    Electron holographic vector field electron tomography visualized three-dimensional (3D) magnetic vortices in stacked ferromagnetic discs in a nanoscale pillar. A special holder with two sample rotation axes, both without missing wedges, was used to reduce artifacts in the reconstructed 3D magnetic vectors. A 1 MV holography electron microscope was used to precisely measure the magnetic phase shifts. Comparison of the observed 3D magnetic field vector distributions in the magnetic vortex cores with the results of micromagnetic simulations based on the Landau-Lifshitz-Gilbert equation showed that the proposed technique is well suited for direct 3D visualization of the spin configurations in magnetic materials and spintronics devices.

    Original languageEnglish
    Pages (from-to)1309-1314
    Number of pages6
    JournalNano Letters
    Volume15
    Issue number2
    DOIs
    Publication statusPublished - 2015 Feb 11

    Keywords

    • Magnetic vortex
    • electron holography
    • ferromagnetic disc
    • vector field tomography

    ASJC Scopus subject areas

    • Bioengineering
    • Chemistry(all)
    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanical Engineering

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