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Magnetoelectric effect in laminate composite of magnets/0.7Pb(Mg1/3Nb2/3)O3–0.3PbTiO3 single crystal

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5 Author(s)
Jia, Yanmin ; State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 215 Chengbei Road, Jiading, Shanghai 201800, China; Graduate School of the Chinese Academy of Sciences, Beijing 10039, China; and Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong ; Zhao, Xiangyong ; Haosu Luo ; Or, Siu Wing
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A magnetoelectric (ME) laminate composite was fabricated by sandwiching one 0.7Pb(Mg1/3Nb2/3)O3–0.3PbTiO3 (PMN-PT) piezoelectric single crystal layer between two NdFeB magnet layers along the thickness direction. The high ME effect was obtained by the product of the magnetic attractive-repellent effect in the magnet layers and the piezoelectric effect in the piezoelectric layer. The magnetoelectric voltage coefficient of the composite was measured to be ∼12.5 mV/cm Oe with a flat frequency response in the range of 0.1–20 kHz. The induced ME voltage showed an excellent linear relationship to the applied ac magnetic field with field amplitude varying from 10-3 to 10 Oe. Other advantages included low heat generation, no bias magnetic field required, and high scale-down capability. These made the composite to be a promising ME material for realizing high-performance, small-size, and low-cost magnetic sensors.

Published in:

Applied Physics Letters  (Volume:88 ,  Issue: 14 )