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Title: Magnetoelectric effect from mechanically mediated torsional magnetic force effect in NdFeB magnets and shear piezoelectric effect in 0.7Pb(Mg[sub ⅓]Nb[sub ⅔])O₃-0.3PbTiO₃ single crystal
Authors: Wang, Yaojin
Or, Derek Siu-wing
Chan, Helen L. W.
Zhao, Xiangyong
Luo, Haosu
Subjects: Composite materials
Lead compounds
Magnetoelectric effects
Piezoelectric materials
Issue Date: 27-Mar-2008
Publisher: American Institute of Physics
Source: Applied physics letters, 27 Mar. 2008, v. 92, 123510, p. 1-3
Abstract: We experimentally and theoretically report the magnetoelectric effect in a composite made by sandwiching one shear mode 0.7PbMg[sub ⅓]Nb[sub ⅔]O₃-0.3PbTiO₃(PMN-PT) piezoelectric single crystal plate between two longitudinally magnetized NdFeB permanent magnet bars along the length direction of the PMN-PT plate. The magnetoelectric effect originates from the mechanically mediated product effect of the torsional magnetic force effect in the NdFeB bars and the shear piezoelectric effect in the PMN-PT plate. The composite exhibits a magnetoelectric voltage coefficient of ~32.7 mV/cm Oe with a flat frequency response in the measured range of 0.1-30 kHz. The induced magnetoelectric voltage shows a good linear relationship to the applied ac magnetic field with amplitude varying from 10[sup -7] to 10ˉ³ T. Other distinct features include no need to have a magnetostrictive phase, low Joule heating loss, and high scale-down capability. These suggest promising applications of the torsional-shear mode composite in power-free magnetic field sensors.
Rights: © 2008 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 Y. Wang et al. Appl. Phys. Lett. 92, 123510 (2008) and may be found at
Type: Journal/Magazine Article
ISSN: 0003-6951
Appears in Collections:AP Journal/Magazine Articles

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