Theoretical and experimental investigation of magnetoelectric effect for bending-tension coupled modes in magnetostrictive-piezoelectric layered composites

Abstract

Articles you may be interested inThe effects of interface misfit strain and surface tension on magnetoelectric effects in layered magnetostrictivepiezoelectric composites J. Appl. Phys. 114, 044109 (2013) In this paper, we discuss a theoretical model with experimental verification for the resonance enhancement of magnetoelectric (ME) interactions at frequencies corresponding to bending-tension oscillations. A dynamic theory of arbitrary laminated magneto-elasto-electric bars was constructed. The model included bending and longitudinal vibration effects for predicting ME coefficients in laminate bar composite structures consisting of magnetostrictive, piezoelectric, and pure elastic layers. The thickness dependence of stress, strain, and magnetic and electric fields within a sample are taken into account, as such the bending deformations should be considered in an applied magnetic or electric field. The frequency dependence of the ME voltage coefficients has obtained by solving electrostatic, magnetostatic, and elastodynamic equations. We consider boundary conditions corresponding to free vibrations at both ends. As a demonstration, our theory for multilayer ME composites was then applied to ferromagnetic-ferroelectric bilayers, specifically Metglas-PZT ones. A theoretical model is presented for static (low-frequency) ME effects in such bilayers. We also performed experiments for these Metglas-PZT bilayers and analyzed the influence of Metglas geometry (length and thickness) and Metglas/PZT volume fraction on the ME coefficient. The frequency dependence of the ME coefficient is also presented for different geometries (length, thickness) of Metglas. The theory shows good agreement with experimental data, even near the resonance frequency. V C 2012 American Institute of Physics.[http://dx

Nonlinear magnetoelectric response of a Metglas/piezofiber laminate to a high-frequency bipolar AC magnetic field

“…In previous reports, motivated by passive magnetic sensor applications, a linear response of ME composites to a weak AC magnetic field H ac was theoretically and experimentally developed for various composite constitutions, configurations, and operation modalities. [3][4][5] A milestone in the development of ME composites was the appearance of ones operated in multi-push-pull mode, consisting of magnetostrictive Metglas foils and piezoelectric Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 (PMN-PT) crystal or Pb(Zr x Ti 1Àx )O 3 (PZT) ceramic fibers with interdigitated (ID)-electrodes. 6 The ME characterization for passive detection in such laminate composites involves a measurement of an induced ME voltage (V ME ) across the ID-electrodes in response to a harmonic incident field of amplitude 0 < H ac < 0.1 Oe and of frequency 0 < f < 100 kHz under various DC magnetic biases of À30 < H dc < 30 Oe.…”

Mechanical loss and magnetoelectric response in magnetostrictive/interdigitated-electrode/piezoelectric laminated resonators

“…14 For the bimorph structure, the maximum value of a V increased nonlinearly with increase of s. This resulted in a decrease of a E with increase of s, which is due to the bending mode value of a E being dependent not only on H dc but also on f. 15 In Figure 2, it can be seen that the optimal value of H dc for the bimorph configuration was notably smaller than that for the sandwich one: this is due to a higher magnetic flux concentration for the three-layer Metglas bimorph configuration than for the six-layer Metglas sandwich one. 16 In each case, the maximum a V was located near the same optimal H dc for the various values of s, indicating that ID-electrode spacing induced mechanical variations are insufficient to change the required magnetic field for the maximum piezomagnetic coefficient of the Metglas layers.…”

An integrated multi-source energy harvester based on vibration and magnetic field energy

“…19 Based on the characteristics of different energy harvester, the MSEHs employ two or more acquisition modules to harvest multi-source energy. However, the method increases energy the harvesters volume and causes the difficulties to miniaturization.…”