Magnetization process in sm fine powders studied using lorentz microscopy and electron holography

Ki Hyun Kim, Joong Jung Kim, Daisuke Shindo, Takashi Ishikawa, Kenji Ohmori

Research output: Contribution to journalArticlepeer-review

Abstract

The magnetization process for Sm2Fe17N3 fine powders was studied by Lorentz microscopy and electron holography. In ex situ observations under the external magnetic field produced by an electromagnet, the change of the domain wall position was observed by Lorentz microscopy, while the drastic change in the distribution of lines of magnetic flux outside the fine powders was clarified by electron holography. Through in Situ observations with a piezodriving holder with localized magnetic field produced by a sharp magnetic needle, the shift of domain walls was observed in real time by Lorentz microscopy. Finally, on the basis of Lorentz microscopy observations, the magnetization process of Sm2Fe17N 3 fine powders was briefly discussed taking into account a hysteresis loop.

Original languageEnglish
Pages (from-to)1302-1307
Number of pages6
JournalMaterials Transactions
Volume51
Issue number7
DOIs
Publication statusPublished - 2010 Jul

Keywords

  • Electron holography
  • Lorenrz microscopy
  • Magnetization process
  • Samarium-iron-nitrogen fine powder

ASJC Scopus subject areas

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

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