Multilayer multiferroic composites with imperfect interfaces

Hsin-Yi Kuo, Tien Jung Wu, Ernian Pan

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

We study the macroscopic behaviors of multilayered multiferroic composites with interface imperfections by a direct micromechanical approach. Both generalized interface stress type and generalized linear spring type imperfect interfaces are considered. Concise matrix expressions of the overall behaviors of the layered piezoelectric-piezomagnetic composite with contact imperfection are presented. The key step is to observe that the two types of imperfect interface conditions are equivalent to the perfect ones due to the laminated geometry. Numerical calculations are demonstrated for BaTiO3-CoFe2O4 multilayer media, and are shown in good agreement with the more involved interphase model. Furthermore, it is observed that the interface imperfection would reduce the magnitude of the magnetoelectric voltage coefficients as compared to the corresponding perfect interface case. This feature is opposite to that predicted and observed in the corresponding cylindrical composites.

Original languageEnglish
Article number075032
JournalSmart Materials and Structures
Volume27
Issue number7
DOIs
StatePublished - 11 Jun 2018

Keywords

  • effective property
  • imperfect interface
  • multilayer multiferroic composite

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