Giant magnetoelectric effect of a hybrid of magnetostrictive and piezoelectric composites

Abstract

A magnetoelectric ͑ME͒ hybrid structure is constructed by an efficient coupling between magnetostrictive Terfenol-D (Tb 0.27-0.30 Dy 0.73-0.70 Fe 1.90-1.95 )/epoxy and piezoelectric leadzirconate-titanate ͓Pb(Zr 0.52 Ti 0.48 )O 3 ͔/epoxy composites. Significant ME effect produced by the piezoelectric k 31 coupling with the longitudinal vibration of the magnetostrictive component over a wide range of frequency is observed. It is revealed that the ME effect can be enhanced by applying an optimized magnetic bias. A magnetoelectric voltage coefficient as high as 8700 mV/cm Oe is recorded at the resonance frequency of 59.2 kHz for the structure with an optimized magnetic bias of 0.7 kOe. Our measurement confirms that the eddy current loss remains negligibly small at an operating frequency as high as ϳ200 kHz, predicting very promising applications of the present ME structure.

Magnetoelectric Properties of a Heterostructure of Magnetostrictive and Piezoelectric Composites

“…2 shows the frequency dependence of for heterostructures with various values and at an optimal magnetic bias field of 0.7 kOe. The determination of this optimal magnetic bias field can be found elsewhere [10]. In all cases, no remarkable frequency dispersion is observed except for the resonance ranges, indicating an excellent frequency stability on the ME effect.…”

“…The heterostructure was prepared by using a cold compression technique. Detailed fabrication procedure can be found from a previous article [10]. In this study, the dimensions of the MSCP were fixed at mm length mm mm, while those of the PECP were mm mm, where the length of the PECP was set at 8, 10.2, and 15 mm.…”

Effective Magnetoelectric Properties of Magnetoelectroelastic (Multiferroic) Materials and Effects on Plane Wave Dynamics

“…On physical grounds, the compliance tensor s is expected to be invertible; the inverse being the material stiffness tensor. We assume that the eigenpairs areφ i and μ i such that Aφ i = μ i Bφ i or in matrix form Aφ = BφD (20) with φ the matrix of eigenvectors and D the corresponding diagonal matrix of eigenvalues, μ i . For convenience we further assume that the eigenvectors are normalized to unity.…”

“…Other authors [15,16] have modeled the magnetoelectric cross-coupling properties of two phase composite systems but were not focused on general models of MEE coupling. Experimental efforts have verified the effectiveness of strain coupled materials [18,20] for static application and the materials community is starting to exam strain coupled materials for high frequency electromagnetic wave applications [17,19]. Chen [8] did work on reflection and transmission coefficients in MEE materials in the quasi-static limit, while Iadonisi [9], published a paper on wave propagation for specific material symmetries with full dynamics included, though only considering propagation along crystal axes.…”

A nonlinear model for magnetocapacitance effect in PZT-ring/Terfenol-D-strip magnetoelectric composites

“…3 The ME effect is calculated under open circuit electric boundary condition, and often require an AC magnetic field and a DC magnetic field, moreover, it can be affected by the frequency of AC magnetic field significantly. [11][12][13][14][15] Furthermore, the ME effect is driven by two magnetic fields, which limited the practical use in some fields. But the MC effect is estimated under close circuit condition and can be achieved with a single DC magnetic field.…”