Electron holography studies on magnetic domains in ferromagnetic shape memory alloys

Y. Murakami, H. S. Park, J. H. Yoo, D. Shindo, K. Oikawa, R. Kaimuma, K. Ishida

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Magnetization distribution in ferromagnetic shape memory alloys has been studied by electron holography and Lorentz microscopy. The observations have revealed that a martensite variant, which is a crystallographic domain in ferromagnetic shape memory alloys, is divided into several 180° magnetic domains in a Ni 2MnGa alloy. The magnetization vectors of the 180° domains are basically oriented along the easy magnetization axis due to the high magnetocrystalline anisotropy of the martensite. Close relations between the magnetic domains and the antiphase domains in the parent phase of a Ni 51Fe 22Ga 27 alloy were also revealed by in situ observations with electron holography.

Original languageEnglish
Pages (from-to)207-211
Number of pages5
JournalMetals and Materials International
Volume10
Issue number3
Publication statusPublished - 2004 Jun 1

Keywords

  • Electron microscopy
  • Martensite
  • Martensitic transformation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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    Murakami, Y., Park, H. S., Yoo, J. H., Shindo, D., Oikawa, K., Kaimuma, R., & Ishida, K. (2004). Electron holography studies on magnetic domains in ferromagnetic shape memory alloys. Metals and Materials International, 10(3), 207-211.