Analytical electron microscopy and electron holography on microstructures and magnetic domain structures of Sm-Co 2:17 magnets

Young Gil Park, Jun Mo Yang, Daisuke Shindo

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Microstructures and magnetic domain structures of precipitation-hardened Sm-Co permanent magnets were systematically investigated by analytical electron microscopy and electron holography. By an elemental mapping method with energy-dispersive X-ray spectroscopy the change in the local distribution of additive elements, i.e. Cu, Fe and Zr, in Sm-Co magnets with various heat treatments was visualized and the enrichment of Zr in the Z-phase with a width of ∼1 nm was clarified directly. Detailed analysis with electron holography revealed that considerable fluctuation in the distribution of lines of magnetic flux in the step-aged magnet was due to the chemical partitioning of additives and resulted in magnetic hardening during the magnetization process.

Original languageEnglish
Pages (from-to)267-270
Number of pages4
JournalJournal of Electron Microscopy
Volume53
Issue number3
DOIs
Publication statusPublished - 2004 Aug 11

Keywords

  • EDS elemental mapping
  • Electron holography
  • Lines of magnetic flux
  • Lorentz microscopy
  • Sm-Co magnet

ASJC Scopus subject areas

  • Instrumentation

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