4.7 Article

Giant circumferential magnetoelectric effect in Pb(Zr,Ti)O3/Mn-Zn-ferrite cylindrical composite

Journal

SENSORS AND ACTUATORS A-PHYSICAL
Volume 330, Issue -, Pages -

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2021.112845

Keywords

Circumferential magnetoelectric effect; Piezoelectric; Frequency response; Demagnetization effect

Funding

  1. Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institution

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The study discovered a giant magnetoelectric effect in Pb(Zr,Ti)O-3(PZT)/Mn-Zn-ferrite cylindrical composite, which originated from the low compliance of Mn-Zn-ferrite, improved interface mechanical coupling, and self-bound effect due to cylindrical structure.
Giant magnetoelectric effect was observed in Pb(Zr,Ti)O-3(PZT)/Mn-Zn-ferrite cylindrical composite with both DC bias and AC magnetic fields along circumferential direction. The circumferential magnetoelectric voltage coefficient alpha(ME,C-C) at low frequency f = 1 kHz and resonance frequency f(r) = 73.9 kHz reaches 1 Vcm(-1) Oe(-1) and 381 Vcm(-1) Oe(-1), respectively, at low optimum bias field H-DC = 0.40 Oe, which is the highest values of circumferential magnetoelectric voltage coefficient in all kinds of magnetoelectric structures reported ever. Combining constitutive equations for piezoelectric phase and magnetic phase under circumferential excitation with equation of motion for continuous medium, the frequency dependence of alpha(ME,C-C) was derived as a function of material parameters and geometrical sizes, which agrees well with the experimental results. The achieved high circumferential magnetoelectric effect originates from low compliance of Mn-Zn-ferrite, improved interface mechanical coupling and self-bound effect due to cylindrical structure, and absence of effect of demagnetization factor with circumferential excitation and bias. The distinct features including giant circumferential ME effect, extremely low bias field and cheap cost of Mn-Zn-ferrite promise the PZT/Mn-Zn-ferrite cylindrical composite as a competitive device for vortex magnetic field detection and transducers. (C) 2021 Elsevier B.V. All rights reserved.

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