The Effect of Magnetic Field-Tuned Resonance on the Capacitance of Laminate Composites

• 作者: Jianguo Tang Lijie Yang Ning Zhang Wei Wang Xiaobin Luo
• 来源期刊: 传感技术(英文)
• 学科: 医学
• 关键词: Composite Materials LAMINATES FUNCTIONAL MAGNETOELECTRIC Coupling Magneto-Capacitance Effects
• 年，卷（期）: cgjsyw_2011,（3）
• 页码范围: 81-85
• 页数: 5页
• 分类号: R73

摘要

The magneto-electric coupling and magneto-capacitance effect of a layer composite ferromagnet/ piezoelectric/ferromagnet was investigated. Several resonant peaks were observed on the curves of the capacitance versus frequency. The resonant peaks were found to shift under an applied magnetic field, and the impedance of the sample can be changed from capacitive to inductive ones with changing the field. Thus, giant negative and positive magneto-capacitance effects can be observed simultaneously under a magnetic field less than 1 k Oe near the resonant points. Experimental and theoretical analysis showed that such magnetically tuned variation in impedance originates from the magnetic field-induced change of the compliances of the magnetic phase of the composite.