Atomic-Resolution X-ray Energy-Dispersive Spectroscopy Chemical Mapping of Substitutional Dy Atoms in a High-Coercivity Neodymium Magnet

Masaru Itakura, Natsuki Watanabe, Minoru Nishida, Takeshi Daio, Syo Matsumura

研究成果: ジャーナルへの寄稿記事

9 引用 (Scopus)

抄録

We have investigated local element distributions in a Dy-doped Nd2Fe14B hot-deformed magnet by atomic-column resolution chemical mapping using an X-ray energy-dispersive spectrometer (XEDS) attached to an aberration-corrected scanning transmission electron microscope (Cscorrected STEM). The positions of the Nd and Dy atomic columns were visualized in the XEDS maps. The substitution of Dy was limited to a surface layer 2-3 unit cells thick in the Nd2Fe14B grains, and the Dy atoms preferentially occupied the 4f-Nd sites of Nd2Fe14B. These results provide further insights into the principal mechanism governing the coercivity enhancement due to Dy doping.

元の言語英語
記事番号050201
ジャーナルJapanese journal of applied physics
52
発行部数5 PART 1
DOI
出版物ステータス出版済み - 5 1 2013

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Neodymium
neodymium
Coercive force
coercivity
Magnets
Spectrometers
magnets
spectrometers
X rays
Atoms
Aberrations
spectroscopy
atoms
aberration
surface layers
x rays
Substitution reactions
Electron microscopes
electron microscopes
Doping (additives)

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

これを引用

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abstract = "We have investigated local element distributions in a Dy-doped Nd2Fe14B hot-deformed magnet by atomic-column resolution chemical mapping using an X-ray energy-dispersive spectrometer (XEDS) attached to an aberration-corrected scanning transmission electron microscope (Cscorrected STEM). The positions of the Nd and Dy atomic columns were visualized in the XEDS maps. The substitution of Dy was limited to a surface layer 2-3 unit cells thick in the Nd2Fe14B grains, and the Dy atoms preferentially occupied the 4f-Nd sites of Nd2Fe14B. These results provide further insights into the principal mechanism governing the coercivity enhancement due to Dy doping.",
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AU - Watanabe, Natsuki

AU - Nishida, Minoru

AU - Daio, Takeshi

AU - Matsumura, Syo

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AB - We have investigated local element distributions in a Dy-doped Nd2Fe14B hot-deformed magnet by atomic-column resolution chemical mapping using an X-ray energy-dispersive spectrometer (XEDS) attached to an aberration-corrected scanning transmission electron microscope (Cscorrected STEM). The positions of the Nd and Dy atomic columns were visualized in the XEDS maps. The substitution of Dy was limited to a surface layer 2-3 unit cells thick in the Nd2Fe14B grains, and the Dy atoms preferentially occupied the 4f-Nd sites of Nd2Fe14B. These results provide further insights into the principal mechanism governing the coercivity enhancement due to Dy doping.

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