Magnetoelectric effects in ferromagnetic cobalt/ferroelectric copolymer multilayer films

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

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

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
Article number112904
JournalApplied Physics Letters
Volume97
Issue number11
DOIs
StatePublished - Sep 13 2010
Externally publishedYes

Fingerprint

copolymers
cobalt
gradients
plane strain
polarization
vinylidene
coupling coefficients
domain wall
fluorides
saturation
thin films
magnetic fields
interactions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Magnetoelectric effects in ferromagnetic cobalt/ferroelectric copolymer multilayer films. / Mardana, A.; Bai, Mengjun; Baruth, Andrew; Ducharme, Stephen; Adenwalla, S.

In: Applied Physics Letters, Vol. 97, No. 11, 112904, 13.09.2010.

Research output: Contribution to journalArticle

Mardana, A. ; Bai, Mengjun ; Baruth, Andrew ; Ducharme, Stephen ; Adenwalla, S. / Magnetoelectric effects in ferromagnetic cobalt/ferroelectric copolymer multilayer films. In: Applied Physics Letters. 2010 ; Vol. 97, No. 11.
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