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J. Compos. Sci. 2017, 1(2), 14;

Insights into the Performance of Magnetoelectric Ceramic Layered Composites

Departamento de Electrónica, Universidad de Alcalá, 28871 Alcalá de Henares, Spain
Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain
Author to whom correspondence should be addressed.
Received: 2 October 2017 / Revised: 26 October 2017 / Accepted: 30 October 2017 / Published: 3 November 2017
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Finite element analysis is used to simulate the magnetoelectric response of magnetostrictive-piezoelectric NiFe2O4-Bi0.36Pb0.64Sc0.36Ti0.64O3 ceramic two-layer, three-layer, and multilayer structures considering finite geometry and introducing the conductivity of the magnetic component. Results are compared with those obtained with existing approximate analytical solutions, and with the experimental data available for high-quality layered composites. Limitations of the widely used analytical solution for a bilayer are revealed, and the reported good agreement with experimental coefficients is shown to be coincidental. Magnetoelectric coefficients obtained by simulation using realistic material parameters are systematically above the experimental values for three-layer and multilayer composites. Possible mechanisms for the reduction in response are analyzed. Strain relaxation across the piezoelectric layer, strongly associated with its mechanical performance, is shown to be the most feasible cause. View Full-Text
Keywords: magnetoelectrics; ceramic composites; layered structures; finite element analysis; performance simulation magnetoelectrics; ceramic composites; layered structures; finite element analysis; performance simulation

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Ramos, P.; Amorin, H.; Ricote, J.; Castro, A.; Alguero, M. Insights into the Performance of Magnetoelectric Ceramic Layered Composites. J. Compos. Sci. 2017, 1, 14.

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