Three-Dimensional Observation of Magnetic Vortex Cores in Stacked Ferromagnetic Discs

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 v...

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Published in:Nano letters 2015-02, Vol.15 (2), p.1309-1314
Main Authors: Tanigaki, Toshiaki, Takahashi, Yoshio, Shimakura, Tomokazu, Akashi, Tetsuya, Tsuneta, Ruriko, Sugawara, Akira, Shindo, Daisuke
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cited_by cdi_FETCH-LOGICAL-a315t-a24548a2c6739e3ed4cff690e0eb46039cb3ad2a0bc95c3581ca7f17c826a503
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container_issue 2
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container_title Nano letters
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creator Tanigaki, Toshiaki
Takahashi, Yoshio
Shimakura, Tomokazu
Akashi, Tetsuya
Tsuneta, Ruriko
Sugawara, Akira
Shindo, Daisuke
description 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.
doi_str_mv 10.1021/nl504473a
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title Three-Dimensional Observation of Magnetic Vortex Cores in Stacked Ferromagnetic Discs
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