Magnetic anisotropy around grain-boundaries in rare-earth magnets and their coercivity

Research output: Contribution to journalReview article

Abstract

Recently, several experimental studies for sintered Nd-Fe-B magnets have shown that their coercivity can be decisively affected by atomic structures around the grain boundaries in the magnets. In this article, a theoretical review is given on possible coercivity reduction mechanisms in sintered Nd-Fe-B or rare-earth based permanent magnets by focusing on the anomalous local magnetic anisotropy found for Nd ions on interfacial structures, based on first-principles calculations and an effective spin model.

Original languageEnglish
Pages (from-to)19-25
Number of pages7
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume81
Issue number1
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • Coercivity
  • Crystal field theory
  • First-principles calculation
  • Magnetic anisotropy
  • Micromagnetic simulati
  • Neodymium-iron-boron

ASJC Scopus subject areas

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

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