Comparison of different measurement methods of magnetostriction

Takeshi Haraki; Kazuyoshi Ishida; Yoshihito Matsumura; Masakazu Fujita; Toshiro Kuji; Hirohisa Uchida

doi:10.1117/12.469404

14 November 2002 Comparison of different measurement methods of magnetostriction

Takeshi Haraki, Kazuyoshi Ishida, Yoshihito Matsumura, Masakazu Fujita, Toshiro Kuji, Hirohisa Uchida

Author Affiliations +

Proceedings Volume 4935, Smart Structures, Devices, and Systems; (2002) https://doi.org/10.1117/12.469404
Event: SPIE's International Symposium on Smart Materials, Nano-, and Micro- Smart Systems, 2002, Melbourne, Australia

Abstract

With increasing interest in micro machine and micro mechatronics, high interest is given to micro devices using magnetostrictive alloys with small sizes. The accurate measurement of magnetostritions ranging from several tens ppm to 1000 ppm of small alloy samples is not easy, and the establishment of measurement methods of magnetostriction of small samples is needed. In this study, four different methods were examined to measure magnetostrictions of small metal samples (cubic samples with sizes smaller than 5 mm x 5 mm x 5 mm ) : Optical interference (OI) method, cantilever (CL) method, strain gauge (SG) method and capacitance (CP) method. The OI method was found to have a high sensitivity, however, too sensitive to measure small deformations of a small sample because of mechanical disturbance induced by surrounding mechanical noises. The CL, SG, and CP methods exhibited similar values of magnetostriction with high stability and reproducibility. This paper reports and discusses results of these measurement methods.

Citation Download Citation

Takeshi Haraki, Kazuyoshi Ishida, Yoshihito Matsumura, Masakazu Fujita, Toshiro Kuji, and Hirohisa Uchida "Comparison of different measurement methods of magnetostriction", Proc. SPIE 4935, Smart Structures, Devices, and Systems, (14 November 2002); https://doi.org/10.1117/12.469404

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