Investigation of the Field-Induced Strain of Shape Memory Alloy in a Pulsed Magnetic Field

Takuo Sakon 1Takashi Fukuda 2Mitsuhiro Motokawa 3,4Tomoyuki Kakeshita 2

1. Dept. Mechanical Enginerring, Fac. Engineering, Akita University (AKITAUNIV), Tegata Gakuenmachi 1-1, Akita City 010-8502, Japan
2. Graduated School of Engineering, Osaka University (OSAKAUNIV), Osaka, Japan
3. Institute for Materials Research, Tohoku University (IMR), Sendai 980-8577, Japan
4. International institute for Advanced Studies (IIAS), Kizu, Kyoto, Japan

Abstract

A system for the simultaneous measurement of magnetization and magnetic strain, which is designed to be used in a pulsed magnetic field, has been developed. In this system, a capacitor on a sample is used and its capacitance changes with the displacement of a sample due to the strain on the sample in a magnetic field. The most significant feature of this system is that magnetization and strain can be measured simultaneously. It is useful to compare the magnetization and magnetic strain (magnetostriction) with each other. Using this system, we have studied the precise magnetization and magnetic field-induced strain (MFIS) of the martensite metallic compound Fe-31.2%Pd (at.%) at temperatures down to 80 K in martensite phase, which is much lower than the martensitic transformation temperature TM = 230 K. Large MFIS has been measured under a pulsed magnetic field with the time constant 6 ms, which corresponds to 80 Hz in frequency. It means that the MFIS occurs even in short-pulse magnetic fields.

 

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Presentation: poster at E-MRS Fall Meeting 2005, Symposium C, by Takuo Sakon
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-04-01 04:37
Revised:   2009-06-07 00:44