Wide-range magnetoelectric response on hybrid polymer composites based on filler type and content

Abstract

Abstract: In order to obtain a wide-range magnetoelectric (ME) response on a ME nanocomposite that matches industry requirements, Tb0.3Dy0.7Fe1.92 (Terfenol-D)/CoFe2O4/P(VDF-TrFE) flexible films were produced by solvent casting technique and their morphologic, piezoelectric, magnetic and magnetoelectric properties investigated. The obtained composites revealed a high piezoelectric response (≈-18 pC.N-1) that is independent of the weight ratio between the fillers. In turn, the magnetic properties of the composites were influenced by the composite composition. It was found that the magnetization saturation values decreased with increasing CoFe2O4 content (from 18.5 to 13.3 emu.g-1) while the magnetization and coercive field values increased (from 3.7 to 5.5 emu.g-1 and from 355.7 to 1225.2 Oe, respectively) with increasing CoFe2O4 content. Additionally, those films showed a wide-range dual-peak ME response at room temperature with the ME coefficient increasing with weight content of Terfenol-D, from 18.6 mV.cm-1.Oe-1 to 42.3 mV.cm-1.Oe-1. ; FCT-Fundação para a Ciência e Tecnologia—for financial support in the framework of the Strategic Funding UID/FIS/04650/2013 and under project PTDC/EEI-SII/5582/2014. Pedro Martins, Silvia Reis and Marco Silva also acknowledge support from FCT (SFRH/BPD/96227/2013, SFRH/BDE/406 and SFRH/BD/70303/2010 grants, respectively). The authors acknowledge funding by the Spanish Ministry of Economy and Competitiveness (MINECO) through the project MAT2016-76039-C4-3-R (AEI/FEDER, UE) (including the FEDER financial support). Financial support from the Basque Government Industry Department under the ELKARTEK program is also acknowledged. The authors thank INL, International Iberian Nanotechnology Laboratory, Braga, Portugal, for offering access to their instruments and expertise ...