We have developed new ferromagnetic shape memory alloys, Co2Ni2-xGax(x=1, 1.12, 1.15, 1.17), which have large strain caused by the magnetic-field-derived re-arrangement of martensite twin. The ribbon samples formed by rapidly solidified, melt-spinning methods showed strong anisotropy and large magnetostriction, ε∼180 × 10-6 at applied magnetic field, 0.8 T in low temperature. In contrast to poor ductility of the well-known ferromagnetic shape memory alloy Ni2MnGa, some of the ribbons have good ductility and are not broken even after bending to an angle of 180°.
|ジャーナル||Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals|
|出版ステータス||Published - 2002 3月|
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