Determination of the atomic width of an APB in ordered CoPt using quantified HAADF-STEM

Hiroshi Akamine, K. H.W. Van Den Bos, N. Gauquelin, S. Farjami, S. Van Aert, D. Schryvers, Minoru Nishida

研究成果: ジャーナルへの寄稿レター

10 引用 (Scopus)

抄録

Anti-phase boundaries (APBs) in an ordered CoPt alloy are planar defects which disturb the ordered structure in their vicinity and decrease the magnetic properties. However, it has not yet been clarified to what extend the APBs disturb the ordering. In this study, high-resolution HAADF-STEM images are statistically analysed based on the image intensities estimated by the statistical parameter estimation theory. In the procedure, averaging intensities, fitting the intensity profiles to specific functions, and assessment based on a statistical test are performed. As a result, the APBs in the stable CoPt are found to be characterised by two atomic planes, and a contrast transition range as well as the centre of an inclined APB is determined. These results show that the APBs are quite sharp and therefore may have no notable effect on the net magnetic properties due to their small volume fraction.

元の言語英語
ページ(範囲)570-574
ページ数5
ジャーナルJournal of Alloys and Compounds
644
DOI
出版物ステータス出版済み - 5 26 2015

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Phase boundaries
Magnetic properties
Statistical tests
Parameter estimation
Volume fraction
Defects

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

これを引用

Determination of the atomic width of an APB in ordered CoPt using quantified HAADF-STEM. / Akamine, Hiroshi; Van Den Bos, K. H.W.; Gauquelin, N.; Farjami, S.; Van Aert, S.; Schryvers, D.; Nishida, Minoru.

:: Journal of Alloys and Compounds, 巻 644, 26.05.2015, p. 570-574.

研究成果: ジャーナルへの寄稿レター

Akamine, Hiroshi ; Van Den Bos, K. H.W. ; Gauquelin, N. ; Farjami, S. ; Van Aert, S. ; Schryvers, D. ; Nishida, Minoru. / Determination of the atomic width of an APB in ordered CoPt using quantified HAADF-STEM. :: Journal of Alloys and Compounds. 2015 ; 巻 644. pp. 570-574.
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abstract = "Anti-phase boundaries (APBs) in an ordered CoPt alloy are planar defects which disturb the ordered structure in their vicinity and decrease the magnetic properties. However, it has not yet been clarified to what extend the APBs disturb the ordering. In this study, high-resolution HAADF-STEM images are statistically analysed based on the image intensities estimated by the statistical parameter estimation theory. In the procedure, averaging intensities, fitting the intensity profiles to specific functions, and assessment based on a statistical test are performed. As a result, the APBs in the stable CoPt are found to be characterised by two atomic planes, and a contrast transition range as well as the centre of an inclined APB is determined. These results show that the APBs are quite sharp and therefore may have no notable effect on the net magnetic properties due to their small volume fraction.",
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T1 - Determination of the atomic width of an APB in ordered CoPt using quantified HAADF-STEM

AU - Akamine, Hiroshi

AU - Van Den Bos, K. H.W.

AU - Gauquelin, N.

AU - Farjami, S.

AU - Van Aert, S.

AU - Schryvers, D.

AU - Nishida, Minoru

PY - 2015/5/26

Y1 - 2015/5/26

N2 - Anti-phase boundaries (APBs) in an ordered CoPt alloy are planar defects which disturb the ordered structure in their vicinity and decrease the magnetic properties. However, it has not yet been clarified to what extend the APBs disturb the ordering. In this study, high-resolution HAADF-STEM images are statistically analysed based on the image intensities estimated by the statistical parameter estimation theory. In the procedure, averaging intensities, fitting the intensity profiles to specific functions, and assessment based on a statistical test are performed. As a result, the APBs in the stable CoPt are found to be characterised by two atomic planes, and a contrast transition range as well as the centre of an inclined APB is determined. These results show that the APBs are quite sharp and therefore may have no notable effect on the net magnetic properties due to their small volume fraction.

AB - Anti-phase boundaries (APBs) in an ordered CoPt alloy are planar defects which disturb the ordered structure in their vicinity and decrease the magnetic properties. However, it has not yet been clarified to what extend the APBs disturb the ordering. In this study, high-resolution HAADF-STEM images are statistically analysed based on the image intensities estimated by the statistical parameter estimation theory. In the procedure, averaging intensities, fitting the intensity profiles to specific functions, and assessment based on a statistical test are performed. As a result, the APBs in the stable CoPt are found to be characterised by two atomic planes, and a contrast transition range as well as the centre of an inclined APB is determined. These results show that the APBs are quite sharp and therefore may have no notable effect on the net magnetic properties due to their small volume fraction.

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