Magnetic-Field-Induced Strain of Shape-Memory Alloy Fe3Pt Studied by a Capacitance Method in a Pulsed Magnetic Field
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概要
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The precise magnetic-field-induced strain (MFIS) and magnetization of the martensite metallic compound Fe3Pt in a martensitic phase were studied in a pulsed magnetic field using the capacitance method at low temperatures down to 4.2 K, which is much lower than the martensitic transformation temperature $T_{\text{M}}=85$ K. After zero field cooling, a pulsed magnetic field with a maximum frequency of 160 Hz was applied parallel to the [001]p axis. A large MFIS was measured. The value of the MFIS is $\Delta L/L=-1.7$%. When the magnetic field was decreased, the recovery of the strain was observed. In the second applied field, a strain of about 0.6% was observed. This means that MFIS occurs even in short-pulse magnetic fields. MFIS was observed below 70 K. The largest strain was observed at 20 K. These results are almost the same as the MFIS in a steady magnetic field using a superconducting magnet.
- 2007-01-15
著者
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Nojiri Hiroyuki
Institute For Material Research Tohoku University
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Motokawa Mitsuhiro
Institute For Materials Research Tohoku University
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Sakon Takuo
Center For Geo-enviromental Science Faculty Of Engineering And Resource Science Akita University
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Kakeshita Tomoyuki
Department Of Material Science And Engineering Graduated School Of Engineering Osaka University
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Dejima Koutatsu
Department Of Mechanical Engineering Faculty Of Engineering And Resource Science Akita University
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Obara Kenji
Department Of Mechanical Engineering Faculty Of Engineering And Resource Science Akita University
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Takaha Atsuo
Department Of Mechanical Engineering Faculty Of Engineering And Resource Science Akita University
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Fukuda Takashi
Department Of Bioscience And Biotechnology Faculty Of Agriculture Shinshu University
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Motokawa Mitsuhiro
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
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Sakon Takuo
Center for Geo-Enviromental Science, Faculty of Engineering and Resource Science, Akita University, Akita 010-8502, Japan
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Obara Kenji
Department of Mechanical Engineering, Faculty of Engineering and Resource Science, Akita University, Akita 010-8502, Japan
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Kakeshita Tomoyuki
Department of Material Science and Engineering, Graduated School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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Takaha Atsuo
Department of Mechanical Engineering, Faculty of Engineering and Resource Science, Akita University, Akita 010-8502, Japan
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Dejima Koutatsu
Department of Mechanical Engineering, Faculty of Engineering and Resource Science, Akita University, Akita 010-8502, Japan
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Fukuda Takashi
Department of Material Science and Engineering, Graduated School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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