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Finite element simulation of the poling process in BaTiO 3 –CoFe 2 O 4 multiferroic composites
Author(s) -
Avakian Artjom,
Gellmann Roman,
Ricoeur Andreas
Publication year - 2014
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201410242
Subject(s) - poling , homogenization (climate) , ferroelectricity , materials science , magnetostriction , multiferroics , finite element method , composite material , nonlinear system , dielectric , constitutive equation , residual stress , smart material , polarization (electrochemistry) , magnetic field , structural engineering , engineering , physics , optoelectronics , biodiversity , ecology , chemistry , quantum mechanics , biology
The theoretical background of nonlinear constitutive magneto‐ferroelectric behavior as well as the Finite Element implementation are presented. On this basis the polarization in the ferroelectric matrix (BaTiO 3 ) with embedded dielectric‐magnetostrictive particels (CoFe2O 4 ) is simulated and the resulting effects are analyzed. Numerical simulations focus on the prediction of local crystal orientations and residual stress going along with the poling process, in the future supplying information on favorable electric‐magnetic loading sequences. Further, multifield homogenization procedures enable the prediction of the electromagnetomechanical properties of smart multiferroic composites and supply useful means for their optimization. The resulting final state of a poling simulation can be implemented as a starting condition for approximate linear simulations. (© 2014 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)