Magnetoelectric coupling, efficiency, and voltage gain effect in piezoelectric-piezomagnetic laminate composites

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...

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Bibliographic Details
Published in:Journal of materials science 2006, Vol.41 (1), p.97-106
Main Authors: Dong, Shuxiang, Li, Jie-Fang, Viehland, D
Format: Article
Language:English
Subjects:
Coils
Composite materials
Coupling coefficients
Eddy currents
Efficiency
electric current
Electric potential
electrical charges
equations
Equivalent circuits
Joining
Laminates
magnetic fields
magnetic properties
Magnetic resonance
Magnetostriction
Materials science
Mathematical analysis
Piezoelectricity
Resonance
Tensors
Thickness
vibration
Voltage
Voltage gain
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Summary: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.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-005-5930-8