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Proceedings Paper

Comparison of different measurement methods of magnetostriction
Author(s): Takeshi Haraki; Kazuyoshi Ishida; Yoshihito Matsumura; Masakazu Fujita; Toshiro Kuji; Hirohisa Uchida
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Paper 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.

Paper Details

Date Published: 14 November 2002
PDF: 8 pages
Proc. SPIE 4935, Smart Structures, Devices, and Systems, (14 November 2002); doi: 10.1117/12.469404
Show Author Affiliations
Takeshi Haraki, Tokai Univ. (Japan)
Kazuyoshi Ishida, Tokai Univ. (Japan)
Yoshihito Matsumura, Tokai Univ. (Japan)
Masakazu Fujita, Mitsui Mining and Smelting Co., Ltd. (Japan)
Toshiro Kuji, Mitsui Mining and Smelting Co., Ltd. (Japan)
Hirohisa Uchida, Tokai Univ. (Japan)

Published in SPIE Proceedings Vol. 4935:
Smart Structures, Devices, and Systems
Erol C. Harvey; Derek Abbott; Vijay K. Varadan, Editor(s)

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