Influence of interfacial bonding condition on magnetoelectric properties in piezofiber/Metglas heterostructures

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

“…The fabrication details for this type of sensor can be found in previous reports. 6,12,13 First, the magnetostriction was characterized using a straingauge method [see Figure 1(a)], the linear ME coefficient as a function of H dc at constant amplitude of H ac ¼ 0.5 Oe at f ¼ 1 kHz [see Figure 1(b)], and the linear ME coefficient as a function of frequency at H dc ¼ 8 Oe and H ac ¼ 0.05 Oe. The piezomagnetic coefficient (dk/dH), calculated directly from the slope of the k-H dc curves, is also presented in Fig.…”

Geometry-induced magnetoelectric effect enhancement and noise floor reduction in Metglas/piezofiber sensors

“…This indicates that there remains notable potential to further enhance the values of a E by improving the interfacial bonding conditions. 11 Additionally, we can see the values of a E for x ¼ 0.357 was even lower than that for x ¼ 0.375. This might be due to higher demagnetization effects in Metglas when wider layers are used.…”

Ultralow equivalent magnetic noise in a magnetoelectric Metglas/Mn-doped Pb(Mg1/3Nb2/3)O3-PbTiO3 heterostructure

“…To tackle this challenge, two corresponding strategies have been employed: (1) enhancement of ME coefficients and (2) reduction of equivalent magnetic noises. For example, composite configurations with high effective energy transduction, component phases with large individual properties, 3 and interface optimization with strain-engineering 4,5 have been studied to enhance the ME coefficients and magnetic field sensitivity. Alternatively, techniques to reduce the equivalent magnetic noise in ME composites need to focus on dominate intrinsic noise sources of the sensor, namely dielectric loss tand (i.e., N DE ¼ ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi 4kTC P tand 2pf q ) and dc leakage…”

“…Compared with multi-push-pull mode Metglas/piezofiber sensors, this L-T mode Metglas/Mn-doped PMN-PT bimorph heterostructure had not only higher ME coefficients and close equivalent magnetic noise floors but also had additional advantages, including: properties repeatability, (i.e., reduction of tand contribution from interfacial epoxy layer 4 ), fabrication flexibility, low cost, and device miniaturization. High-quality Mn-doped PMN-PT single crystals were grown directly from a melt by a modified Bridgman technique.…”

“…Metglas were commercially supplied with composition Fe 74. 4 Co 21. 6 Si 0.5 B 3.3 Mn 0.1 C 0.1 (Vacuumscheltze GmbH & Co. KG, Germany) as a roll with a thickness of 25 lm, and were cut into foils of dimensions 80 Â 8 mm 2 .…”