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Title: Converse magnetoelectric effect in three-phase composites of piezoceramic, metal cap, and magnet
Authors: Wong, WY
Or, DSW 
Chan, HLW 
Jia, Y
Luo, H
Keywords: Lead compounds
Samarium alloys
Cobalt alloys
Ferromagnetic materials
Composite materials
Magnetoelectric effects
Electromagnetic induction
Issue Date: 24-Apr-2007
Publisher: American Institute of Physics
Source: Journal of applied physics, 24 Apr. 2007, v. 101, 09N508, p. 1-3 How to cite?
Journal: Journal of applied physics 
Abstract: We report experimentally and theoretically the converse magnetoelectric (CME) effect in a three-phase piezoceramic-metal-cap-magnet composite made by sandwiching a thickness-polarized Pb(Zr[sub x]Ti[sub 1−x])O₃ (PZT) disk between two truncated conical brass caps and two thickness-magnetized SmCo disks. The reported CME effect originates from the product of the converse piezoelectric effect in the PZT disk, the mechanical transformation/amplification effect in the brass caps, and the magnetic induction effect in the SmCo disks. The composite exhibits a large CME coefficient (α[sub B]) in excess of 2 mG/V with a flat response in the broad frequency range of 0.1-100 kHz. The measured magnetic flux density shows an extremely linear relationship to the applied voltage with amplitude varying from 10 to 100 V over a wide range of detection distance of 0.7-6.5 mm. This electromechanomagnetically coupled effect enables applications of the composite in coil-free magnetic flux control devices, featuring smaller Joule heating loss, wider operational bandwidth, and greater property-tailorable flexibility compared to conventional electromagnet-based devices.
ISSN: 0021-8979
Rights: © 2007 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 W.Y. Wong et al. J. Appl. Phys. 101, 09N508 (2007) and may be found at
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