Magnetic properties of Sm-Co and Sm-Co/M (M=Co, Fe) exchange-spring films

Yoshihiro Yamazaki, Kazuhide Takano, Hitoshi Takamura, Satoshi Sugimoto, Motofumi Homma, Masuo Okada

Research output: Contribution to journalArticlepeer-review


The structure and magnetic properties of Sm-Co films and Sm-Co/M (M=Co, Fe) multilayered films prepared by rf sputtering were investigated. The results show that a hard magnetic phase as Sm2Co17 and SmCo5 phase and a soft magnetic phase were formed by annealing Sm-Co and Sm-Co/M films. Sm16Co84 film annealed for 1.8 ks at 773 K had the springback ratio of [Mr′-M(H)]/[Mr-M(H)]=0.72. This film was found to behave as a exchange-spring magnet composed of a hard magnetic phase and a soft magnetic phase. Sm16Co84/Fe multilayered film was also found to be a exchange-spring magnet.

Original languageEnglish
Pages (from-to)827-832
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Issue number9
Publication statusPublished - 1997 Sept


  • Exchange coupling
  • Exchange-spring magnet
  • Film magnet
  • Reversible magnetization
  • Sm-Co system


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