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Capacitive Type Magnetoimpedance Effect of PbZr0.48Ti0.52O3/Tb0.3Dy0.7Fe1.92 in Magnetoelectric Composite Vibrator(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2016年03期
Page:
40-
Research Field:
·物理学·
Publishing date:

Info

Title:
Capacitive Type Magnetoimpedance Effect of PbZr0.48Ti0.52O3/Tb0.3Dy0.7Fe1.92 in Magnetoelectric Composite Vibrator
Author(s):
Wang Zhifeng1; He Wenqiang1; Wang Wei1; 2
（1.School of Physics and Technology，Nanjing Normal University，Nanjing 210023，China）（2.Laboratory of Modern Acoustics of MOE，Nanjing University，Nanjing 210093，China）
Keywords:
magnetoelectric composite vibrator; capacitive type
PACS:
O441.6；O482.52+6
DOI:
10.3969/j.issn.1001-4616.2016.03.007
Abstract:
Resonance frequency and impedance matching are important parameters in piezoelectric transducer. In this paper，a magnetoelectric（ME）composite vibrator made of PbZr0.48Ti0.52O3/Tb0.3Dy0.7Fe1.92 double ring were developed. It was found that the variation of relatively effective permittivity of the ME composite resonator with a dc magnetic field is responsible for capacitive type magnetoimpedance effect. About 18% and 32% of magnetoimpedance have been achieved at resonance and anti-resonance frequencies of the ME resonator，respectively. In addition，the resonant frequency of ME composite vibrator shift with increasing dc magnetic field. The resonance and anti-resonance frequencies offset were about 9 kHz when?the?magnetic?field intensity was 800 mT. Based on the magnetic-force-electricity coupling effect，we theoretically analyzed the capacitive type magnetoimpedance effect and magnetically tuned mechanical resonances in the ME composite resonator. The study provides experimental and theoretical basis for solving the problem of resonance frequency shift and impedance mismatch in piezoelectric transducer.

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Last Update: 2016-09-30