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Journal of Intelligent Material Systems and Structures
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Magnetoelectric Effect in Piezoelectric/Magnetostrictive Multilayer (2-2) Composites

Marco Avellaneda

Courant Institute of Mathematical Sciences New York, NY 10012

Girish Harshé

Materials Research Laboratory Pennsylvania State University University Park, PA 16802

We consider the magnetoelectric effect arising in a multilayer composite consisting of bonded layers of a piezoelectric ceramic and a magnetostrictive material operating in the linear regime. Magnetoelectric coupling arises from the mechanical contacts between layers and the elec tric/mechanical and magnetic/mechanical coupling in each phase. Calculations of the magnetoelec tric coefficient {alpha}* as well as of the figures of merit kme and kme,cl are presented. These calculations fully take into account the electric, magnetic and mechanical mismatch in the material properties, as well as the volume-fractions of both materials. We derive the optimal volume fraction fcrit1 of piezoelectric material needed to maximize the figure of merit k fme or kme,cl for the composite and give criteria for optimizing the magnetoelectric effect in terms of the choice of the individual constit uents. We computed the figures of merit of a variety of piezoelectric/magnetostrictive combinations. The combinations CoFe2O4/PZT5H (kme = 14%), Terfenol D/PZT5A (kme = 22%) and Terfenol D/PZT4 (kme = 30%) show reasonable energy transfer to be useful as magnetoelectric transducers.

Journal of Intelligent Material Systems and Structures, Vol. 5, No. 4, 501-513 (1994)
DOI: 10.1177/1045389X9400500406
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 Journal of Intelligent Material Systems and StructuresHome page
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