Enhancement of Magnetic Properties of Sm(Fe, Co, Ti)12 Melt-Spun Ribbons by Refining Crystallized Grains

Satoshi Sugimoto, Masuo Okada, Motofumi Homma, Akihiko Kojima

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Present works describe the improvement of the magnetic properties of Sm(Fe, Ti)12 melt-spun ribbons with ThMn12-type structure. In order to increase the remanence, the Ti content was decreased and the heat treatment temperature and time were lowered and shortened, respectively. As a result, the maximum energy products increases. The (BH)max of 56.8 kJm-3 (7.1 MGOe) was obtained with SmFe11.25Ti0.75 melt-spun ribbons annealed at 770°C for 10 min. This is the highest energy products among reported values on melt-spun ribbons in ternary Sm-Fe-Ti system so far. The Co addition is effective for increasing the saturation magnetization. Sm(Fe0.8Co0.2)11.25Ti0.75 melt-spun ribbon exhibits the high maximum energy products of 67.2 kJm-3 (8.4 MGOe) after annealing at 800°C for 10 min. Microstructural studies indicate that the ribbons consist of fine grains which have the average grain diameter of nearly 40 nm.

Original languageEnglish
Pages (from-to)1180-1183
Number of pages4
JournalMaterials Transactions, JIM
Issue number12
Publication statusPublished - 1991


  • (BH)
  • Sm(Fe, Ti) compounds
  • high remanence
  • melt-spun ribbons
  • the exchange interaction

ASJC Scopus subject areas

  • Engineering(all)


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