Intrinsic hard magnetic properties of Sm(Fe1 − xCox)12 compound with the ThMn12 structure

Y. Hirayama, Y. K. Takahashi, S. Hirosawa, K. Hono*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

129 Citations (Scopus)


We have grown Sm(Fe1 − xCox)12 (x = 0, 0.1 and 0.2) films epitaxially on V(001) buffered MgO(001) single crystalline substrates in order to investigate the intrinsic hard magnetic properties of the Co substituted SmFe12 phase with the ThMn12 structure. We found Sm(Fe0.8Co0.2)12 has excellent intrinsic hard magnetic properties with spontaneous magnetization of 1.78 T, anisotropy field of 12 T and Curie temperature of 859 K, all of which are superior to those for Nd2Fe14B. Hence, the Sm(Fe0.8Co0.2)12 compound is promising as permanent magnet material, if it can be stabilized in a bulk form.

Original languageEnglish
Pages (from-to)62-65
Number of pages4
JournalScripta Materialia
Publication statusPublished - 2017 Sept
Externally publishedYes


  • Hard magnet
  • Permanent magnet
  • SmFe
  • ThMn structure

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys


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