Tailored magnetoelectric coupling in magnetically oriented polymer-based iron fiber composite

Artificial multiferroics magnetoelectric (ME) polymer composite films exhibiting collective ferroelectric and magnetic orderings are gaining attractive for the use of flexible ME devices. Herein an anisotropic polymer-based ME composites films is developed, composed of magnetically oriented polycrystalline iron fiber (Fe-f) and poly (vinylidene fluoride-co-trifluoroethylene) P(VDF-TrFE). The structure, ferroelectric, piezoelectric, magnetic, and ME properties was systematically investigated. Both Fe-f fillers content and magnetic field direction determined the ME voltage coefficient, magnetical polarization and dielectric response in anisotropic P(VDF-TrFE)-Fe-f composites. Specifically, the composite with 16% filler loading delivers a peak ME value of 44.5 mV.cm(-1).Oe(-1) with magnetic field exerted along the fiber axial alignment direction. Such extracted results may encourage a way to optimize flexible composite in anisotropic contactless sensing and detecting applications.

Automated summary

The study developed an artificial multiferroics magnetoelectric polymer composite film with collective ferroelectric and magnetic orderings, suitable for flexible ME devices. Both the Fe-f fillers content and magnetic field direction impact the ME performance of the composite film, with the composite containing 16% filler delivering optimal performance when a magnetic field is exerted along the fiber axial alignment direction.