Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5989
Title: Concurrent operational modes and enhanced current sensitivity in heterostructure of magnetoelectric ring and piezoelectric transformer
Authors: Zhang, S
Leung, CM
Kuang, W
Or, DSW 
Ho, SL 
Keywords: Boron alloys
Composite materials
Dysprosium alloys
Electric sensing devices
Iron alloys
Lead compounds
Magnetization
Magnetoelectric effects
Magnetostrictive devices
Neodymium alloys
Piezoceramics
Piezoelectric devices
Resins
Terbium alloys
Transformers
Issue Date: 7-May-2013
Publisher: American Institute of Physics
Source: Journal of applied physics, 7 May 2013, v. 113, no. 17, 17C733, p. 1-3 How to cite?
Journal: Journal of applied physics 
Abstract: A heterostructure possessing two concurrent operational modes: current sensing (CS) mode and current transduction (CT) mode and an enhanced current sensitivity associated with the CT mode is proposed by combining a magnetoelectric ring (MER) with a piezoelectric transformer (PET). The MER is a ring-shaped magnetoelectric laminate having an axially polarized Pb(Zr, Ti)O ₃ (PZT) piezoelectric ceramic ring sandwiched between two circumferentially magnetized, inter-magnetically biased Tb ₀.₃ Dy ₀.₇ Fe ₁.₉₂ (Terfenol-D) short-fiber/NdFeB magnet/epoxy three-phase magnetostrictive composite rings, while the PET is a Rosen-type PZT piezoelectric ceramic transformer. The current sensitivity (S₁) and magnetoelectric voltage coefficient (αV) of the heterostructure in the two operational modes are evaluated theoretically and experimentally. The CS mode provides a large S₁of ∼10 mV/A over a flat frequency range of 10 Hz−40 kHz with a high resonance S₁ of 157 mV/A at 62 kHz. The CT mode gives a 6.4-times enhancement in resonance S₁, reaching 1000 mV/A at 62 kHz, as a result of the amplified vortex magnetoelectric effect caused by the vortex magnetoelectric effect in the MER, the matching of the resonance frequencies between the MER and the PET, and the resonance voltage step-up effect in the PET.
URI: http://hdl.handle.net/10397/5989
ISSN: 0021-8979 (print)
DOI: 10.1063/1.4801390
Rights: © 2013 AIP Publishing LLC. 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 Shengyao Zhang et al., J. Appl. Phys. 113, 17C733 (2013) and may be found at http://link.aip.org/link/?jap/113/17C733
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