Emergence of coercivity in Sm(Fe 0.8 Co 0.2 ) 12 thin films via eutectic alloy grain boundary infiltration

D. Ogawa, X. D. Xu, Y. K. Takahashi, T. Ohkubo, S. Hirosawa, K. Hono

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

The anisotropy field of the ThMn 12 -type Sm(Fe 0.8 Co 0.2 ) 12 compound is high. However, there is an absence of reports on sufficiently high coercivity for anisotropic permanent magnet application. In this study, we employed the grain boundary diffusion process to anisotropic Sm(Fe 0.8 Co 0.2 ) 12 thin films. As-grown (001)-textured nanocrystalline film exhibit a coercivity of only 0.4 T. However, the grain boundary diffusion process via a Cu-Ga capping layer increases coercivity to 0.8 T. The coercivity exhibits relatively low temperature dependence when compared to that of Nd-Fe-B magnets.

Original languageEnglish
Pages (from-to)140-144
Number of pages5
JournalScripta Materialia
Volume164
DOIs
Publication statusPublished - 2019 Apr 15
Externally publishedYes

Keywords

  • Coercivity
  • Grain boundary diffusion process
  • 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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