Multipeak self-biased magnetoelectric coupling characteristics in four-phase Metglas/Terfenol-D/Be-bronze/PMN-PT structure

Abstract

This letter develops a self-biased magnetoelectric (ME) structure Metglas/Terfenol-D/Be-bronze/PMN-PT (MTBP) consisting of a magnetization-graded Metglas/Terfenol-D layer, a elastic Be-bronze plate, and a piezoelectric 0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3 (PMN-PT) plate. By using the magnetization-graded Metglas/Terfenol-D layer and the elastic Be-bronze plate, multi-peak self-biased ME responses are obtained in MTBP structure. The experimental results show that the MTBP structure with two layers of Metglas foil has maximum zero-biased ME voltage coefficient (MEVC). As frequency increases from 0.5 to 90 kHz, eleven large peaks of MEVC with magnitudes of 0.75-33 V/(cm Oe) are observed at zero-biased magnetic field. The results demonstrate that the proposed multi-peak self-biased ME structure may be useful for multifunctional devices such as multi-frequency energy harvesters or low-frequency ac magnetic field sensors.

Self‐biased magnetoelectric composite for energy harvesting

“…Metglas/Terfenol-D/Be-bronze/PMN-PT, a fourphase SME composite with a cross-shaped ME structure, was proposed, as shown in Figure 7D. 181 With the use of a nonmagnetic anisotropic elastic beryllium bronze plate sandwiched between Metglas and Terfenol-D layers, a multimodal SME response was obtained from the composite structure. 182 In the frequency range of 0.5 kHz to 90 kHz, 11 ME voltage peaks were observed in a zero-bias magnetic field, and the amplitude ranged from 0.75 V cm −1 Oe −1 to 33 V cm −1 Oe −1 .…”

“…Metglas/Terfenol–D/Be–bronze/PMN–PT, a four‐phase SME composite with a cross‐shaped ME structure, was proposed, as shown in Figure 7D 181 . With the use of a nonmagnetic anisotropic elastic beryllium bronze plate sandwiched between Metglas and Terfenol–D layers, a multimodal SME response was obtained from the composite structure 182 .…”

Multiple broadband magnetoelectric response in Terfenol-D/PZT structure

“…In order to overcome the shortcoming, many efforts have been made to obtain a wide ME response in ME composites by adopting different electric connections, [17,18] fabricating particular structures, [19][20][21] implementing different mechanical boundary conditions, [22] and using anisotropic piezoelectric materials. [23] A broadband ME response can be achieved in those researches, but the ME coefficient is reduced or the resonant frequency is too high, which is not suitable for detecting low frequency alternating current (AC) magnetic field.…”