Suppression of ferromagnetism within antiphase boundaries in Ni 50Mn25Al12.5Ga12.5 alloy

Y. Murakami, T. Yano, R. Y. Umetsu, R. Kainuma, D. Shindo

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

This paper reports on the unexpectedly narrow magnetic domain walls observed at the positions of antiphase boundaries (APB) in a system of ferromagnetic shape memory alloys Ni50Mn25Al 12.5Ga12.5. Lorentz microscopy observations determined the wall width at the APB position to be 12 nm, which is substantially smaller than the width at the APB-free position of 48 nm. This result can be explained by the modulation of magnetic parameters near APB, within which ferromagnetism is suppressed by the deterioration of Heusler-type ordering.

Original languageEnglish
Pages (from-to)895-898
Number of pages4
JournalScripta Materialia
Volume65
Issue number10
DOIs
Publication statusPublished - 2011 Nov

Keywords

  • Lorentz microscopy
  • Magnetic domain
  • Order-disorder phenomena
  • Shape memory alloys
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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