Magnetoelectric effect in composites of magnet, metal-cap, and piezoceramic

Jia, Y.M., Or, S.W., Lam, K.H. , Chan, H.L.W., Tang, Y.X., Zhao, X.Y. and Luo, H.S. (2007) Magnetoelectric effect in composites of magnet, metal-cap, and piezoceramic. Applied Physics A: Materials Science and Processing, 86(4), pp. 525-528. (doi: 10.1007/s00339-006-3805-8)

Abstract

We report on the magnetoelectric (ME) effect in three-phase magnet-metal-cap-piezoceramic composites of a thickness-polarized Pb(Zr,Ti)O3 disk bonded between two truncated conical brass caps and two thickness-magnetized NdFeB magnets along the thickness direction. The effect originated from the product of the magnetic attractive–repellent effect in the magnets and the amplified piezoelectric effect in the cap-disk assembly. The composites exhibited a ME voltage coefficient αV of ∼2.6 mV/Oe in the non-resonance frequency range of 0.1–10 kHz with good voltage-field linearity in the field range of 10-3–10 Oe, besides an enhanced αV of 167.4 mV/Oe at a resonance frequency of 14.4 kHz. Compared to conventional two-phase and three-phase magnetostrictive material-contained ME composites, these composites possessed two distinct benefits of higher property-tailorable flexibility and requiring no external dc bias magnetic field to enable an obvious αV.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Lam, Dr Koko
• Authors: Jia, Y.M., Or, S.W., Lam, K.H., Chan, H.L.W., Tang, Y.X., Zhao, X.Y., and Luo, H.S.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Applied Physics A: Materials Science and Processing
• Publisher: Springer
• ISSN: 0947-8396
• ISSN (Online): 1432-0630