Electron holography studies on narrow magnetic domain walls observed in a heusler alloy Ni 50Mn 25Al 12.5Ga 12.5

Hyun Soon Park, Yasukazu Murakami, Keiichi Yanagisawa, Tsuyoshi Matsuda, Ryosuke Kainuma, Daisuke Shindo, Akira Tonomura

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Peculiar magnetic domain walls produced in Heusler alloys, which have attracted renewed interest due to their potential application to actuators and spintronic devices, are studied here using electron holography. The observations reveal unexpectedly narrow magnetic domain walls, the width of which showed perfect agreement with that of the antiphase boundaries (APB, e.g., only 3 nm). While the results can be explained by the significant depression of ferromagnetism due to the local chemical disorder, the electron phase shift indicates that ferromagnetic correlation still remains in the APB region. Peculiar magnetic domain walls produced in a Heusler alloy are studied using electron holography. The observations reveal unexpectedly narrow magnetic domain walls, the width of which shows perfect agreement with that of the antiphase boundaries (e.g., only 3 nm). This method provides beneficial information for obtaining a deeper understanding of the magnetic order in the vicinity of an interface.

Original languageEnglish
Pages (from-to)3434-3437
Number of pages4
JournalAdvanced Functional Materials
Volume22
Issue number16
DOIs
Publication statusPublished - 2012 Aug 21

Keywords

  • actuators
  • alloys
  • holography
  • magnetic materials
  • shape-memory materials

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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