Magnetic Properties of Sm-Co and Sm-Co/M (M=Co, Fe) Exchange-Spring Films.

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  • Yamazaki Yoshihiro
    Department of Materials Science, Faculty of Engineering, Tohoku University
  • Takano Kazuhide
    Department of Materials Science, Faculty of Engineering, Tohoku University
  • Takamura Hitoshi
    Department of Materials Science, Faculty of Engineering, Tohoku University
  • Sugimoto Satoshi
    Department of Materials Science, Faculty of Engineering, Tohoku University
  • Homma Motofumi
    Department of Materials Science, Faculty of Engineering, Tohoku University
  • Okada Masuo
    Department of Materials Science, Faculty of Engineering, Tohoku University

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Other Title
  • シナジー磁石　Ｓｍ‐ＣｏおよびＳｍ‐Ｃｏ／Ｍ（Ｍ＝Ｃｏ，Ｆｅ）交換スプリング薄膜の磁気特性
  • Sm Co オヨビ Sm Co M M Co Fe コウカン スプリング ハク

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Abstract

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.

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