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- Title
Magnetoelectric coupling, efficiency, and voltage gain effect in piezoelectric-piezomagnetic laminate composites.
- Authors
Shuxiang Dong; Jie-Fang Li; Viehland, D.
- Abstract
The magnetoelectric (ME) effect of piezoelectric-magnetostrictive laminate composites, which is a product tensor, has been studied. Based on piezoelectric and piezomagnetic constituent equations, the longitudinal-mode vibration and equivalent circuits have been derived. The effective magnetoelectric coupling coefficient, voltage-gain, and output efficiency have been determined. Our results show: (i) that there is an extreme high voltage gain effect of >260 under resonance drive: the induced ME voltage is much higher than the input voltage to the coils for magnetic excitation; (ii) that there is an optimum ratio of the piezoelectric to piezomagnetic layer thicknesses, which results in maximum effective magnetoelectric coupling; and (iii) that the maximum output efficiency of magnetoelectric laminate at resonance drive is ∼98%, if eddy currents are neglected. This high ME voltage gain effect offers potential for power transformer applications.
- Subjects
PIEZOELECTRICITY; FERROELECTRICITY; MAGNETIC fields; MAGNETIC coupling; ELECTRIC coils; PIEZOELECTRIC devices
- Publication
Journal of Materials Science, 2006, Vol 41, Issue 1, p97
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-005-5930-8