Electron holography study on magnetization process in nanocrystalline and microcrystalline Fe73.5Si13.5B9Nb3́ Cu1 Films

Young Gil Park, Hyun Soon Park, Daisuke Shindo, Yoshihito Yoshizawa

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Magnetic domain structures in Fe73.5Si13.5B 9Nb3Cu1 alloys annealed at different temperatures have been observed in situ under external magnetic fields by electron holography. Under a weak magnetic field of less than several A/m, a typical magnetization process of the high permeability material is observed in the specimen annealed at 823 K consisting of the bcc Fe-Si nanocrystalline and the amorphous matrix phase. On the other hand, in the specimen annealed at 973 K consisting of large Fe-Si grains and Fe-B compounds, many domain walls are observed at the boundaries between Fe-Si grains and also between Fe-B grains. Under a strong magnetic field of more than several kA/m, domain walls are observed only between Fe-B grains. The result indicates that the boundaries between Fe-B grains act as stronger pinning sites of domain walls than the boundaries between Fe-Si grains and those between Fe-Si and Fe-B grains in the Fe73.5Si13.5B9Nb3Cu1 alloy annealed at 973 K.

Original languageEnglish
Pages (from-to)3059-3062
Number of pages4
JournalMaterials Transactions
Volume46
Issue number12
DOIs
Publication statusPublished - 2005 Dec

Keywords

  • Domain wall pinning
  • Electron holography
  • In situ observation
  • Line of magnetic flux
  • Magnetization process
  • Magnetization rotation

ASJC Scopus subject areas

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

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