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

doi:10.1021/nl504473a

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 journal › Article › peer-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 language	English
Pages (from-to)	1309-1314
Number of pages	6
Journal	Nano Letters
Volume	15
Issue number	2
DOIs	https://doi.org/10.1021/nl504473a
Publication status	Published - 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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10.1021/nl504473a

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title = "Three-dimensional observation of magnetic vortex cores in stacked ferromagnetic discs",

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.",

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AU - Tanigaki, Toshiaki

AU - Takahashi, Yoshio

AU - Shimakura, Tomokazu

AU - Akashi, Tetsuya

AU - Tsuneta, Ruriko

AU - Sugawara, Akira

AU - Shindo, Daisuke

PY - 2015/2/11

Y1 - 2015/2/11

N2 - 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.

AB - 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.

KW - Magnetic vortex

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KW - vector field tomography

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

Abstract

Keywords

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