Magnetic-Field Induced Two-Way Shape Memory Effect of Ferromagnetic Ni2MnGa Sputtered Films
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- Ohtsuka Makoto
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
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- Konno Yuya
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
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- Matsumoto Minoru
- Institute of Fluid Science, Tohoku University
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- Takagi Toshiyuki
- Institute of Fluid Science, Tohoku University
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- Itagaki Kimio
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
書誌事項
- タイトル別名
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- Magnetic-Field Induced Two-Way Shape Memory Effect of Ferromagnetic Ni<SUB>2</SUB>MnGa Sputtered Films
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The shape memory effect (SME) induced by the magnetic field is interesting and important for physics and application. The ferromagnetic Ni2MnGa films with various compositions were deposited on a poly-vinyl alcohol (PVA) substrate with a radio-frequency (RF) magnetron sputtering apparatus using four kinds of Ni–Mn–Ga targets. After separating from the substrate, the films were heat-treated at 1073 K for 3.6 ks for homogenization and aged at 673 K for 3.6 ks in a constraint condition. The reversible two-way SME by the thermal change was confirmed for the constraint-aged films with various compositions. The gradient of the strain–temperature curve, the amount of strain accompanied by the two-way SME and the width of thermal hysteresis were dependent on the composition of the films. The strain–temperature curve shifted to a high temperature region and the martensitic phase was stabilized by the applied magnetic field. Furthermore, the two-way SME by the magnetic field was observed around the martensitic transformation temperature on cooling for the constraint-aged film, which showed the large gradient and small thermal hysteresis in the strain–temperature curve.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 47 (3), 625-630, 2006
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390001204251029632
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- NII論文ID
- 130004453037
- 10017959589
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 7858414
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 使用不可