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Title: Ring-type electric current sensor based on ring-shaped magnetoelectric laminate of epoxy-bonded Tb₀.₃Dy₀.₇Fe₁.₉₂ short-fiber/NdFeB magnet magnetostrictive composite and Pb(Zr, Ti)O₃ piezoelectric ceramic
Authors: Leung, CM
Or, DSW 
Zhang, S
Ho, SL 
Keywords: Boron alloys
Dysprosium alloys
Electric sensing devices
Iron alloys
Lead compounds
Magnetic field measurement
Magnetic sensors
Magnetoelectric effects
Magnetostrictive devices
Neodymium alloys
Terbium alloys
Issue Date: 1-May-2010
Publisher: American Institute of Physics
Source: Journal of applied physics, 1 May 2010, v. 107, no. 9, 09D918, p. 1-3 How to cite?
Journal: Journal of applied physics 
Abstract: A ring-type electric current sensor operated in vortex magnetic field detection mode is developed based on a ring-shaped magnetoelectric laminate of an axially polarized Pb(Zr, Ti)O₃ (PZT) piezoelectric ceramic ring bonded between two circumferentially magnetized epoxy-bonded Tb₀.₃Dy₀.₇Fe₁.₉₂ (Terfenol-D) short-fiber/NdFeB magnet magnetostrictive composite rings. The electric current sensitivity of the sensor was evaluated, both theoretically and experimentally. The sensor showed a high nonresonance sensitivity of ∼12.6 mV/A over a flat frequency range of 1 Hz–30 kHz and a large resonance sensitivity of 92.2 mV/A at the fundamental shape resonance of 67 kHz, besides an excellent linear relationship between the input electric current and the output magnetoelectrically induced voltage. The power-free, bias-free, high-sensitive, and wide-bandwidth natures of the sensor make it great potential for real-time condition monitoring of engineering systems having electric current-carrying cables or conductors.
ISSN: 0021-8979
EISSN: 1089-7550
DOI: 10.1063/1.3360349
Rights: © 2010 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in C.M. Leung et al., J. Appl. Phys. 107, 09D918 (2010) and may be found at
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