Magnetostrictive Properties of Fe-Ga/Ni Bimorph Layers

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Giant magnetostrictive Fe-Ga alloys are expected as actuator/sensor materials with high respective velocity and large stress created by the magnetostriction. To develop magnetostrictive material induced by low magnetic fields, we investigated magnetostrictive (positive magnetostriction/negative magnetostriction) bimorph layers, that is, Fe<SUB>80</SUB>Ga<SUB>20</SUB> ribbon (146 μm)/Ni (14 μm) film produced by magnetron sputtering. The Fe<SUB>80</SUB>Ga<SUB>20</SUB> ribbon was prepared by rapid solidification. The magnetostrictive property of the cantilever-type foil was determined experimentally using the optical lever method. The displacement of the upper part of the foil with a length of 22 mm was 530 μm under a low steady magnetic field of 40 kAm<SUP>−1</SUP> and exhibits little hysteresis. These magnetostrictive properties are also maintained under a low-frequency alternating magnetic field. Moreover, the displacement of the foil at the mechanical resonance frequency exhibits a peak and reaches 2.0 mm at a weak magnetic field of 4 kAm<SUP>−1</SUP>. The magnetostrictive bimorph layers are useful for applications in microdevices such as micropumps.

収録刊行物

  • Materials transactions  

    Materials transactions 48(2), 117-120, 2007-02-01 

    The Japan Institute of Metals and Materials

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各種コード

  • NII論文ID(NAID)
    10018508441
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13459678
  • NDL 記事登録ID
    8623555
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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