Suppressing Geometric Phase Shift Owing to Antiphase Boundaries in Dark-Field Electron Holography

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  • Cho Youngji
    Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University
  • Niitsu Kodai
    Department of Materials Science and Engineering, Kyoto University
  • Midoh Yoshihiro
    Graduate School of Information Science and Technology, Osaka University
  • Nakamae Koji
    Graduate School of Information Science and Technology, Osaka University
  • Shindo Daisuke
    Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University Center for Emergent Matter Science (CEMS), RIKEN
  • Yang Jun-Mo
    Nano-Convergence Technology Division, National Nanofab Center
  • Murakami Yasukazu
    Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University The Ultramicroscopy Research Center, Kyushu University

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Abstract

<p>Antiphase boundaries (APBs) formed in Fe70Al30 alloy have attracted significant attention because they intensify ferromagnetic spin order by atomic disordering. Electron holography can be a useful tool for examining the magnetism in APB regions, although the observations suffer from an undesired contribution from an additional geometric phase shift in the incident electron wave. This paper proposes a method based on dark-field electron holography to suppress the unwanted geometric phase shift owing to APBs in electron holograms. The results of this study yield useful information for examining APBs and other planar defects in ordered crystals.</p>

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 60 (5), 698-703, 2019-05-01

    The Japan Institute of Metals and Materials

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