A polyvinylidene-fluoride（PVDF）-based magnetoelectric torque（MET） device is designed with elastic layer sandwiched by PVDF layers, and low-frequency MET effect is carefully studied. It is found that elastic modulu...A polyvinylidene-fluoride（PVDF）-based magnetoelectric torque（MET） device is designed with elastic layer sandwiched by PVDF layers, and low-frequency MET effect is carefully studied. It is found that elastic modulus and thickness of the elastic layer have great influences on magnetoelectric（ME） voltage coefficient（α（ME）） and working range of frequency in PVDF-based MET device. The decrease of the modulus and thickness can help increase the α ME. However,it can also reduce the working range in the low frequency. By optimizing the parameters, the giant α（ME） of 320 V/cm·Oe（1 Oe = 79.5775 A·m^-1 at low frequency（1 Hz） can be obtained. The present results may help design PVDF-based MET low-frequency magnetic sensor with improved magnetic sensitivity in a relative large frequency range.展开更多
In this study, we investigate the nonlinear cou- pling magneto-electric （ME） effect of a giant magnetostric- tive/piezoelectric composite cylinder. The nonlinear consti- tutive relations of the ME material are taken...In this study, we investigate the nonlinear cou- pling magneto-electric （ME） effect of a giant magnetostric- tive/piezoelectric composite cylinder. The nonlinear consti- tutive relations of the ME material are taken into account, and the influences of the nonlinear material properties on the ME effect are investigated for the static and dynamic cases, respectively. The influences of different constraint conditions on the ME effect are discussed. In the dynamic case considering nonlinear material properties, the double frequency ME response （The response frequency is twice the applied magnetic frequency） is obtained and discussed, which can be used to explain the experiment phenomenon in which the input signal with frequency f is converted to the output signal with 2f in ME laminated structures. Some calculations on nonlinear ME effect are conducted. The obtained results indicate that the nonlinear material properties affect not only the magnitude of the ME effect in the static case but also the ME response frequency in the dynamic case展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.51525103,51522105,and 11304326)the National Key Technology Research and Development Program of China(Grant No.2016YFA0201102)+1 种基金Ningbo Municipal Science and Technology Innovation Team,China(Grant No.2015B11001)the Ningbo Municipal Major Science and Technology Projects,China(Grant No.2015B11027)
文摘A polyvinylidene-fluoride（PVDF）-based magnetoelectric torque（MET） device is designed with elastic layer sandwiched by PVDF layers, and low-frequency MET effect is carefully studied. It is found that elastic modulus and thickness of the elastic layer have great influences on magnetoelectric（ME） voltage coefficient（α（ME）） and working range of frequency in PVDF-based MET device. The decrease of the modulus and thickness can help increase the α ME. However,it can also reduce the working range in the low frequency. By optimizing the parameters, the giant α（ME） of 320 V/cm·Oe（1 Oe = 79.5775 A·m^-1 at low frequency（1 Hz） can be obtained. The present results may help design PVDF-based MET low-frequency magnetic sensor with improved magnetic sensitivity in a relative large frequency range.
基金supported by the National Natural Science Foundation of China (11072093)the State Key Program of National Natural Science of China (11032006)the Fundamental Research Funds for the Central Universities (lzujbky-2012-k05)
文摘In this study, we investigate the nonlinear cou- pling magneto-electric （ME） effect of a giant magnetostric- tive/piezoelectric composite cylinder. The nonlinear consti- tutive relations of the ME material are taken into account, and the influences of the nonlinear material properties on the ME effect are investigated for the static and dynamic cases, respectively. The influences of different constraint conditions on the ME effect are discussed. In the dynamic case considering nonlinear material properties, the double frequency ME response （The response frequency is twice the applied magnetic frequency） is obtained and discussed, which can be used to explain the experiment phenomenon in which the input signal with frequency f is converted to the output signal with 2f in ME laminated structures. Some calculations on nonlinear ME effect are conducted. The obtained results indicate that the nonlinear material properties affect not only the magnitude of the ME effect in the static case but also the ME response frequency in the dynamic case
