The Effect of Magnetic Field-Tuned Resonance on the Capacitance of Laminate Composites
Lijie Yang, Jianguo Tang, Wei Wang, Xiaobin Luo, Ning Zhang
DOI: 10.4236/jst.2011.13011   PDF   HTML     5,288 Downloads   10,856 Views   Citations


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.

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L. Yang, J. Tang, W. Wang, X. Luo and N. Zhang, "The Effect of Magnetic Field-Tuned Resonance on the Capacitance of Laminate Composites," Journal of Sensor Technology, Vol. 1 No. 3, 2011, pp. 81-85. doi: 10.4236/jst.2011.13011.

Conflicts of Interest

The authors declare no conflicts of interest.


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