Enhanced Resonance Magnetoelectric Coupling in (1‐1) Connectivity Composites

Abstract

Bulk-magnetoelectric (ME) composites consisting of various piezoelectric and piezomagnetic materials with (3-0), (3-1), (2-2), and (2-1) connectivity are proposed in a bid to realize strong ME coupling for next-generation electronic-device applications. Here, 1D (1-1) connectivity ME composites consisting of a [011]-oriented Pb(Mg,Nb)O -PbTiO (PMN-PT) single-crystal fiber laminated with laser-treated amorphous FeBSi alloy (Metglas) and operating in L-T mode (longitudinally magnetized and transversely poled) are reported, which exhibit an enhanced resonant ME coupling coefficient of ≈7000 V cm Oe , which is nearly seven times higher than the best result published previously, and also a superhigh magnetic sensitivity of 1.35 × 10 T (directly detected) at resonance at room temperature, representing a significant advance in bulk magnetoelectric materials. The theoretical analyses based on magnetic-circuit and equivalent-circuit methods show that the enhancement in ME coupling can be attributed to the reduction in resonance loss of laser-treated Metglas alloy due to nanocrystallization and the strong magnetic-flux-concentration effect in (1-1) configuration composites.

A 1D Magnetoelectric Sensor Array for Magnetic Sketching

“…[10] The principle behind the search-coil is Faraday's law of induction, which means the induced voltage is proportional to the rate of the change in the magnetic flux passing through the coil. [20,24] The attractive research orientations for ME sensors are to i) lower the noise and enhance the limit of detection and ii) to develop the system-level application in different cases. Moreover, to recognize the weak magnetic field, it is necessary to increase the radius and turns of coil, making the coil very unwieldy.…”

“…And the search-coil is often limited to the detection for the alternating current magnetic field. [24] Moreover, the anisotropy factor of the (1-1) connectivity ME sensor reached a value as high as 150-300, which is the vital characteristic for magnetic positioning and imaging. A fluxgate www.advmattechnol.de working at room-temperature and on the basis of the strainmediated magneto-to-electric coupling principle, have emerged recently.…”

“…Moreover, to recognize the weak magnetic field, it is necessary to increase the radius and turns of coil, making the coil very unwieldy. [24] In the field of DC filed sensing, Gao and coworkers designed a 3-axis man-portable magnetoelectric DC magnetic sensor. [16][17][18][19][20][21][22][23] Compared with magnetic sensors mentioned above, the ME sensor shows great potential for weak magnetic detection due to its superhigh magnetic field sensitivity.…”

“…[25] Li et al also reported a nanoelectromechanical system magnetoelectric sensor with a limit of detection of 800 pT in an opening environment. [24] Figure 2 depicts the schematic view of the dipole detection using the magnetic detecting and sketching system. [16,19,[27][28][29][30][31][32] However, the system-level application based on the ME sensor is still in an early stage, although some prototypes have been developed for different usage scenarios.…”

A flexible, high-performance magnetoelectric heterostructure of (001) oriented Pb(Zr0.52Ti0.48)O3film grown on Ni foil

“…These directional variations in ME response of PZT/Ni may be related to the demagnetization effect and the resultant differential magnetic flux distribution in the Ni foil. The effective magnetic field (H eff ) and magnetic induction (B eff ) in the magnetic phase are influenced by the demagnetizing field (H d ) and the applied magnetic field (H bias ) according to [35][36][37] …”