Magnetic domain structure in the presence of very thin martensite plates: Electron holography study on a thin-foil Fe-31.2 at.%Pd alloy

Y. Murakami, D. Shindo, T. Sakamoto, T. Fukuda, T. Kakeshita

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The magnetic domain structure of a thin-foil Fe-31.2 at.%Pd alloy, wherein the thickness of the martensite plates (of the order of 10 nm) is comparable to that of the magnetic domain walls, has been studied by electron holography and Lorentz microscopy. Magnetic flux maps obtained by electron holography demonstrate that the magnetization vectors are not necessarily oriented along the easy magnetization axis of the martensite - the result is in sharp contrast to the case of thick martensite plates (of the order of 102 nm or larger). This observation provides important information for actuator applications that utilize thin-foil ferromagnetic shape memory alloys. The change in the magnetic domain structure with the face-centered cubic to face-centered tetragonal martensitic transformation is also discussed.

Original languageEnglish
Pages (from-to)1233-1239
Number of pages7
JournalActa Materialia
Volume54
Issue number5
DOIs
Publication statusPublished - 2006 Mar 1

Keywords

  • Electron holography
  • Lorentz microscopy
  • Magnetic domain
  • Martensitic phase transformation
  • Shape memory alloy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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