Giant phase shift effect in Tb0.3Dy0.7Fe2/Pb(Zr,Ti)O3 laminated composite

Abstract

In this letter we present a magnetic field-induced giant phase shift effect under resonant frequency in the bilayered magnetoelectric composite of Tb0.3Dy0.7Fe2(Terfenol-D) and Pb(Zr,Ti)O3. When the bias magnetic field is varied from 0.1 T to 0.3 T, the phase shift of the magnetoelectric effect under 83.2 kHz was as large as 180°, which implies a complete transformation from capacitor behavior to inductor behavior. The phase shift was analyzed in the polar coordinates, and the mechanism of this giant phase shift was considered as the ΔE effect of Terfenol-D. This giant phase shift effect may benefit existing phase modulation techniques.

Directional magnetoelectric effect in multi-electrode Pb(Zr,Ti)O3/Ni cylindrical layered composite

“…2b on the expanded frequency scale, the four units at the two peaks have almost the same ME voltage coefficients α E,V and the curves almost overlap with each other. For all resonance peaks, the phase shifts are all nearly 180°, consistent with previous reports [9,12]. The curves for the phase φ around the first peaks also coincide.…”

“…ME laminates with different shapes and configurations have been made. They have different vibration modes, such as bending and radial vibration in disk laminates [9], bending and longitudinal vibration in rectangular composites and torsion vibration in other structures [10][11][12][13]. It has been demonstrated that Ni/PZT and Ni/PZT/Ni cylindrical ME laminates made by electroplating have giant ME coupling with radial and axial vibration modes [14,15].…”

Theory of tunable magnetoelectric inductors in ferrite-piezoelectric layered composite

“…Originally, the ME effect was predicted theoretically [6] and first observed in antiferromagnetic compounds of Cr 2 O 3 with extremely weak ME couplings of 20 mV cm −1 Oe at room temperature [7,8], and the ME effects in layered bulk composites consisting of magnetostrictive ferrites, rare-earth alloys or permalloy with piezoelectric ceramics or single crystals are expected to be strong with the highest ME coefficient of 1100 V cm −1 Oe reported so far [9][10][11]. Moreover, the research focuses are involved in a variety of underlying physics concerning spin torque, charge and strain transfer, providing a great possibility of candidates for potential applications in magnetic/current sensors, energy harvesters, phase shifters, resonators/filters, electrically-controlled RF spintronics, random access memories, V-I/I-V gyrators, voltage transformers, microwave attenuators, signal generators and tunable inductors [12][13][14][15][16][17][18][19]. Generally, the ME couplings can be roughly classified into two categories: direct ME (DME) effects and converse ME (CME) effects [20].…”

Synchronous Characterization of Self-Bias Magnetoelectric Composite Materials

“…Since significant magnetoelectric was found in composite materials consisting of piezoelectric phase and magnetostrictive phase, its mechanism and application has drawn lots of attentions. Until now, many prototype devices based on magnetoelectric composite materials have been developed, such as magnetic field sensors [1], energy harvesters [2], voltage transformers [3], phase shifters [4], and multi-states memory cells [5]. The magnetoelectric effect in composite materials is considered as a product effect of piezoelectric effect and magnetostrictive effect [6].…”