Strain measurement in ferromagnetic crystals using dark-field electron holography

Yasukazu Murakami, Kodai Niitsu, Syuhei Kaneko, Toshiaki Tanigaki, Taisuke Sasaki, Zentaro Akase, Daisuke Shindo, Tadakatsu Ohkubo, Kazuhiro Hono

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    This study proposes a method to separate the geometric phase shift due to lattice strain from the undesired phase information, resulting from magnetic fields that are superposed in the dark-field electron holography (DFEH) observations. Choosing a distinct wave vector for the Bragg reflection reversed the sense of the geometric phase shift, while the sense of the magnetic information remained unchanged. In the case of an Nd-Fe-B permanent magnet, once the unwanted signal was removed by data processing, the residual phase image revealed a strain map. Even though the applications of DFEH have thus far been limited to non-magnetic systems, the method proposed in this work is also applicable to strain measurements in various ferromagnetic systems.

    Original languageEnglish
    Article number193102
    JournalApplied Physics Letters
    Volume109
    Issue number19
    DOIs
    Publication statusPublished - 2016 Nov 7

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Fingerprint

    Dive into the research topics of 'Strain measurement in ferromagnetic crystals using dark-field electron holography'. Together they form a unique fingerprint.

    Cite this