Enhancement of the Magnetoelectric Effect in Multiferroic CoFe2O4/PZT Bilayer by Induced Uniaxial Magnetic Anisotropy

  title={Enhancement of the Magnetoelectric Effect in Multiferroic CoFe2O4/PZT Bilayer by Induced Uniaxial Magnetic Anisotropy},
  author={Alex Aubert and Vincent Loyau and Fr{\'e}d{\'e}ric Mazaleyrat and Martino LoBue},
  journal={IEEE Transactions on Magnetics},
In this paper, we have compared magnetic, magnetostrictive, and piezomagnetic properties of isotropic and anisotropic cobalt ferrite pellets. The isotropic sample was prepared by the ceramic method while the sample exhibiting uniaxial anisotropy was made by reactive sintering using spark plasma sintering (SPS). This technique permits us to induce a magnetic anisotropy in cobalt ferrite in the direction of the applied pressure during the SPS process. Sample with uniaxial anisotropy revealed a… Expand

Figures from this paper

Anisotropy of magnetoelectric effects in an amorphous ferromagnet-piezoelectric heterostructure
Abstract In-plane anisotropy of linear and nonlinear magnetoelectric (ME) effects in a heterostructure composed of mechanically coupled layers of amorphous iron-based ferromagnet and piezoelectricExpand
Anisotropic Magnetoelectric Effect in a Planar Heterostructure Comprising Piezoelectric Ceramics and Magnetostrictive Fibrous Composite
A nonlinear ME effect in the output voltage, namely frequency doubling, was observed and the frequency and field dependences of the efficiency of the ME transduction in the MFC-piezoelectric heterostructure are well described by the existing theory. Expand
Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites
Applications of magnetostrictive materials commonly involve the use of the dynamic deformation, i.e., the piezomagnetic effect. Usually, this effect is described by the strain derivative ∂λ=∂H, whichExpand
Effects of remanent magnetization on dynamic magnetomechanical and magnetic-sensing characteristics in bi-layer multiferroics
Influences of remanent magnetization on dynamic magnetomechanical mechanisms in a bi-layer asymmetric magnetoelectric (ME) laminate consisting of lead zirconate titanate and samarium iron alloy hasExpand
Investigation of Piezomagnetism in Nickel Ferrite
Applications of magnetostrictive materials, such as sensors and energy-harvesting devices, generally involve the use of the dynamic deformation, i.e., the piezomagnetic effect, induced by an excitingExpand
Self-biased magnetoelectric coupling effect in the layered La0.7Sr0.3MnO3/BaTiO3/La0.7Sr0.3MnO3 multiferroic heterostructure
Abstract The experimental observation and analysis of self-biased magnetoelectric (ME) coupling effect in the layered La0.7Sr0.3MnO3/BaTiO3/La0.7Sr0.3MnO3 (LSMO/BTO/LSMO) multiferroic heterostructureExpand
Enhanced magnetoelectric voltage in ferrite/PZT/ferrite composite for AC current sensor application
In this paper, we report the fabrication of a rare-earth free current sensor based on a PZT/NiCoZn-ferrite magnetoelectric (ME) trilayer composite disk. To improve the sensitivity of the sensor, theExpand
Effect of Lanthanum Substituted CoFe2-xLaxO4 on Change of Structure Parameter and Phase Formation
In this research, CoFe2-xLaxO4-based smart magnetic material has been developed which will be applied as a microwave absorbing material. This smart magnetic material is an artificial advancedExpand
Investigation of electrical transport and magnetoelectric coupling of codoped ferrite–PbZr0.58Ti0.42O3 multiferroic nanocomposites
The multiferroic magnetoelectric materials have gained intensive research interest in the recent years due to their prospective applications. In this perspective, the thermally tunable complexExpand
Synthèse, caractérisation et modélisation de matériaux multiferroiques (magnétoélectriques) composites massifs
L'effet magnetoelectrique direct est defini par la modification de la polarisation electrique a partir de l'application d'un champ magnetique. Bien que cet effet existe de maniere intrinseque dansExpand


Uniaxial anisotropy and enhanced magnetostriction of CoFe2O4 induced by reaction under uniaxial pressure with SPS
Abstract In this study, we have compared magnetic and magnetostrictive properties of polycrystalline CoFe2O4 pellets, produced by three different methods, focusing on the use of Spark PlasmaExpand
Magnetoelectric Effect in Composites of Magnetostrictive and Piezoelectric Materials
In the past few decades, extensive research has been conducted on the magnetoelectric (ME) effect in single phase and composite materials. Dielectric polarization of a material under a magnetic fieldExpand
Study of uniaxial magnetism and enhanced magnetostriction in magnetic-annealed polycrystalline CoFe2O4
Magnetic and magnetostrictive properties of magnetic-annealed polycrystalline CoFe2O4 were investigated. The magnetic hysteresis loops showed obvious uniaxiality with an induced easy directionExpand
Large enhancement of magnetostriction due to compaction hydrostatic pressure and magnetic annealing in CoFe2O4
Polycrystalline CoFe2O4 was produced by a ceramic method. The heat-treated powder was pressed, varying the hydrostatic pressure between 87 and 278 MPa, and was heat-treated again at 1350 °C for 24 h.Expand
Numerical modeling of the magnetoelectric effect in magnetostrictive piezoelectric bilayers
A numerical modeling of the magnetoelectric (ME) effect in the bilayer structures lead zirconate titanate (PZT)/lanthanum strontium manganite (LSMO), PZT/nickel ferrite (NFO) and PZT/cobalt ferriteExpand
Resonance magnetoelectric effects in layered magnetostrictive-piezoelectric composites
Magnetoelectric interactions in bilayers of magnetostrictive and piezoelectric phases are mediated by mechanical deformation. This work is concerned with the theory and companion data forExpand
Improvement of magnetomechanical properties of cobalt ferrite by magnetic annealing
We report dramatic improvements in both magnetostriction level and strain derivative of polycrystalline cobalt ferrite as a result of magnetic annealing. Magnetostrictive cobalt ferrite compositesExpand
Analytical modeling of demagnetizing effect in magnetoelectric ferrite/PZT/ferrite trilayers taking into account a mechanical coupling
In this paper, we investigate the demagnetizing effect in ferrite/PZT/ferrite magnetoelectric (ME) trilayer composites consisting of commercial PZT discs bonded by epoxy layers to Ni-Co-Zn ferriteExpand
Magnetoelectric effects in ferrite-lead zirconate titanate layered composites: The influence of zinc substitution in ferrites
The observation of strong magnetoelectric (ME) coupling is reported in zinc-substituted layered composites of ferrites and lead zirconate titanate (PZT). Multilayer samples contained cobalt zincExpand
Theory of low-frequency magnetoelectric effects in ferromagnetic-ferroelectric layered composites
A theoretical model is presented for low-frequency magnetoelectric (ME) effects in bilayers of magnetostrictive and piezoelectric phases. An approach is proposed for the consideration of actualExpand