Magnetoelectric effects in ferromagnetic cobalt/ferroelectric copolymer multilayer films

A. Mardana, Mengjun Bai, A. Baruth, Stephen Ducharme, S. Adenwalla

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16 Scopus citations


Interactions between a ferromagnet, cobalt, and a ferroelectric copolymer, poly(vinylidene fluoride with trifluoroethylene) in thin film heterostructures result in a 5% change in the ferroelectric polarization on application of a perpendicular 6 kG magnetic field corresponding to a magnetoelectric coupling coefficient of α=5.45 V/cm Oe. The effect disappears on magnetic saturation, ruling out conventional strain coupling. A simple model posits that the ferroelectric film develops in-plane strain gradients, a consequence of the coupling to strain gradients present at the domain walls in the multidomain Co layer, resulting in the measured polarization change via the flexoelectric effect.

Original languageEnglish (US)
Article number112904
JournalApplied Physics Letters
Issue number11
StatePublished - Sep 13 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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