Analysis of microstructure and magnetic domain structure in Sm-Fe-N particles by transmission electron microscopy

Akira Yasuhara, Daisuke Shindo, Masahiro Tobise

Research output: Contribution to journalReview articlepeer-review

Abstract

Microstructures and magnetic domain structures of isotropic and anisotropic Sm-Fe-N bonded magnets were investigated by transmission electron microscopy and electron holography, respectively. In addition to mechanical polishing, ion-milling and focused ion beam methods were utilized to prepare thin specimens for transmission electron microscopy. With these thin specimens, the sizes of particles in anisotropic and isotropic bonded magnets were estimated, and also magnetization distributions in these particles were clarified. Furthermore, by changing the direction of the incident electron beam against a thin specimen, a pair of holograms were observed to separate the electric and magnetic fields. Thus, detailed magnetization distribution in Sm-Fe-N was clarified at the specimen edge.

Original languageEnglish
Pages (from-to)320-325
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume68
Issue number5
DOIs
Publication statusPublished - 2004 May

Keywords

  • Electron energy-loss spectroscopy
  • Electron holography
  • Lorentz-microscopy
  • Samarium iron nitrogen bonded magnet
  • Transmission electron microscope

ASJC Scopus subject areas

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

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