Title: Magnetoelectricity of barium titanate/cobalt ferrite nanoparticles incorporated into poly(vinylidene fluoride-co-trifluoroethylene) copolymer films

Authors: Morad Etier

Addresses: Industrial Engineering Department, The Hashemite University, Zarqa, 13133, Jordan

Abstract: Incorporating ferroelectric and ferromagnetic nanoparticles into copolymers can produce composites with novel properties for broad applications especially in electronics. In this research, nanoparticles of barium titanate (BTO) and cobalt iron oxide (CFO) were chemically synthesised and then individually incorporated in poly(vinylidene fluoride-co-trifluoroethylene) to form multi-layered magnetoelectric film. BTO-P(VDF-TrFE)/CFO-P(VDF-TrFE)/BTO-P(VDF-TrFE) sandwich type films - (20-30 μm in thickness each) - were synthesised using a home-made simple mould casting and blending techniques. The addition of BTO and CFO nanoparticles to the polymer enhanced the dielectric constant, but lowered the ferroelectric-paraelectric phase transition temperature of the P(VDF-TrFE). For the sandwich type film, a maximum value of direct out of plane magnetoelectric coupling coefficient (α₃₃) 145 mV/cm·Oe was measured at ambient temperature. For such structure, the perfect isolating condition of the cobalt ferrite piezomagnetic phase and the proper contact and bonding between the piezoelectric and magnetostrictive phases enhanced the magnetoelectric effect. The fabricated film could be a potential candidate for magnetoelectric devices and sensor applications.

Keywords: multiferroics; barium titanate; cobalt ferrite; magnetoelectric; nanoparticles; film.

DOI: 10.1504/IJMATEI.2020.112097

International Journal of Materials Engineering Innovation, 2020 Vol.11 No.4, pp.309 - 322

Received: 10 Feb 2020
Accepted: 02 Apr 2020
Published online: 04 Jan 2021 *

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