Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/12325
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Title: High current sensitivity and large magnetoelectric effect in magnetostrictive-piezoelectric concentric ring
Authors: Leung, CM
Or, SW 
Ho, SL 
Issue Date: 2014
Source: Journal of applied physics, 2014, v. 115, no. 17, 17A933, p. 17A933-1-17A933-3
Abstract: A magnetostrictive-piezoelectric concentric ring (MPCR) is fabricated, and its current sensitivity and magnetoelectric effect are studied theoretically and experimentally. The MPCR has an inner Tb0.3Dy0.7Fe 1.92/NdFeB/epoxy magnetostrictive composite ring with a circumferential magnetization and an internal magnetic biasing bonded concentrically to an outer Pb(Zr, Ti)O3 piezoelectric ceramic ring with a wall-thickness polarization. The current sensing in the MPCR is based on the direct coupling of vortex magnetic fields generated by current-carrying cables with the magnetoelectric effect in the MPCR structure. The MPCR shows high and linear current sensitivities and magnetoelectric voltage coefficients of 15-17 mV/A and 22-26 mV/Oe in the nonresonance frequency range of 1 Hz-50 kHz, and of 185 mV/A and 277 mV/Oe at the fundamental shape resonance of 96 kHz, for current and vortex magnetic field levels of up to 10 A and 6.7 Oe, respectively.
Publisher: American Institute of Physics
Journal: Journal of applied physics 
ISSN: 0021-8979
EISSN: 1089-7550
DOI: 10.1063/1.4867227
Rights: © 2014 AIP Publishing LLC.
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in C. M. Leung, S. W. Or and S. L. Ho, J. Appl. Phys. 115, 17A933 (2014) and may be found at https://dx.doi.org/10.1063/1.4867227
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