Structural and magnetoelectric properties of MFe2O4-PZT (M=Ni,Co) and (La)x(Ca,Sr)1-x - PZT multilayers

TL;DR

This study investigates the structural, magnetic, and magnetoelectric properties of layered composites made from ferrites and manganites with PZT, revealing stronger effects in ferrite-based composites and correlations with magnetic permeability.

Contribution

It presents new multilayer composites with detailed characterization, highlighting the superior magnetoelectric effect in ferrite-PZT compared to manganite-PZT.

Findings

NFO-PZT exhibits the highest ME voltage coefficient at room temperature.

Ferrite-PZT composites show stronger ME effects than manganite-PZT.

Transverse ME effect is significantly stronger than longitudinal.

Abstract

Thick film layered magnetoelectric composites consisting of ferromagnetic and ferroelectric phases have been synthesized with nickel ferrite (NFO), cobalt ferrite (CFO), La0.7Sr0.3MnO3 (LSMO), or La0.7Ca0.3MnO3 (LCMO) and lead zirconate titanate (PZT). Structural, magnetic and ferromagnetic resonance characterization shows evidence for defect free ferrites, but deterioration of manganite parameters. The resistivity and dielectric constants are smaller than expected values. The magnetoelectric effect (ME) is stronger in ferrite-PZT than in manganite-PZT. The ME voltage coefficient aE at room temperature is the highest in NFO-PZT and the smallest for LCMO-PZT. The transverse ME effect is an order of magnitude stronger than the longitudinal effect. The magnitude of aE correlates well with magnetic permeability for the ferrites.