Recent advances in SmFe12-based permanent magnets

Y. K. Takahashi, H. Sepehri-Amin, T. Ohkubo

Research output: Contribution to journalArticlepeer-review

Abstract

To realize a sustainable society, ‘green technology’ with low (or even zero) CO2 emissions is required. A key material in such technology is a permanent magnet because it is utilized for electric-power conversion in several applications including electric vehicles (EVs), hybrid EVs (HEVs), and turbines for wind power generation. To realize highly efficient electric-power conversion, a stronger permanent magnet than Nd–Fe–B is necessary. One potential candidate is a Fe-rich SmFe12-based compound with a ThMn12 structure. In this paper, the phase stability, structure, and intrinsic and extrinsic magnetic properties in both film and bulk forms are reviewed. Based on these results, a possible way to realize a strong SmFe12-based permanent magnet in bulk form is discussed.

Original languageEnglish
Pages (from-to)449-460
Number of pages12
JournalScience and Technology of Advanced Materials
Volume22
Issue number1
DOIs
Publication statusPublished - 2021

Keywords

  • 203 Magnetics / Spintronics / Superconductors
  • 40 Optical
  • coercivity
  • magnetic and electronic device materials
  • Permanent magnet
  • Sm(Fe-Co)
  • ThMn

ASJC Scopus subject areas

  • Materials Science(all)

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