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

Takuya Yoshioka, Hiroki Tsuchiura

Research output: Contribution to journalReview articlepeer-review


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
Issue number1
Publication statusPublished - 2017


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


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