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Proceedings Paper

New high-sensitivity hybrid magnetostrictive/electroactive magnetic field sensors
Author(s): Jiankang Huang; Robert C. O'Handley; David Bono
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Paper Abstract

A recently developed class of magnetic field sensors is based on the action of a magnetostrictive material on a piezoelectric material. Described here is a significant improvement on this class, a passive magnetic field sensor made of layers of Terfenol-D {Fe2(Dy0.7Tb0.3)} magnetostrictive material and ceramic PZT-5. These devices show a large magnetic field sensitivity of order 6 kV/T. Application of this device to harvesting vibration energy indicates that more than 10 mW of electrical power can be harvested using a Terfenol-D/PZT/ Terfenol-D sandwich (volume = 1 cm3) from 30 Hz vibrations having an acceleration of 0.5 g.

Paper Details

Date Published: 22 July 2003
PDF: 9 pages
Proc. SPIE 5050, Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems, (22 July 2003); doi: 10.1117/12.484257
Show Author Affiliations
Jiankang Huang, Ferro Solutions, Inc. (United States)
Massachusetts Institute of Technology (United States)
Robert C. O'Handley, Massachusetts Institute of Technology (United States)
David Bono, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 5050:
Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems
Daniele Inaudi; Eric Udd, Editor(s)

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