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9 March 2014 Modeling of ferroelectric-ferromagnetic composites to improve magnetoelectric coupling and durability
Andreas Ricoeur, Artjom Avakian, Zhibin Wang
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Proceedings Volume 9058, Behavior and Mechanics of Multifunctional Materials and Composites 2014; 90580H (2014) https://doi.org/10.1117/12.2044917
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States
Abstract
The coupling of magnetic and electric fields due to the constitutive behavior of a material is commonly denoted as ME-effect. The latter is only observed in a few crystal classes exhibiting a very weak coupling which can hardly be exploited for technical applications. Much larger coupling coefficients are obtained in so called multiferroic composite materials, where ferroelectric and ferromagnetic constituents are embedded in a matrix. The MEeffect is then induced by the strain of the matrix converting electrical and magnetic energies based on the ferroelectric and magnetostrictive effects. In this paper, the theoretical background of nonlinear constitutive multifield behavior as well as the Finite Element implementation are presented. Nonlinear material models describing the magneto-ferroelectric behavior are presented. On this basis, the poling process in the ferroelectric phase is simulated and resulting effects are analyzed. Numerical simulations in general focus on the prediction of ME coupling coefficients and residual stresses going along with the poling process. Numerical homogenization, here, is a useful means to supply effective properties.
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Andreas Ricoeur, Artjom Avakian, and Zhibin Wang "Modeling of ferroelectric-ferromagnetic composites to improve magnetoelectric coupling and durability", Proc. SPIE 9058, Behavior and Mechanics of Multifunctional Materials and Composites 2014, 90580H (9 March 2014); https://doi.org/10.1117/12.2044917
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KEYWORDS
Composites
Magnetism
Crystals
Ferromagnetics
Homogenization
Numerical simulations
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