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首页> 美国卫生研究院文献>Materials >Experimental Investigation of the Magnetoelectric Effect in NdFeB-Driven A-Line Shape Terfenol-D/PZT-5A Structures
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Experimental Investigation of the Magnetoelectric Effect in NdFeB-Driven A-Line Shape Terfenol-D/PZT-5A Structures

机译：NdFeB驱动的A线形Terfenol-D / PZT-5A结构中的磁电效应的实验研究

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摘要

In this paper, the magnetoelectric (ME) effect is investigated in two kinds of A-line shape Terfenol-D/PZT-5A structures by changing the position of the NdFeB permanent magnet. The experimental results show that both ME composite structures had multiple resonance peaks. For the ME structure with acrylonitrile-butadiene-styrene (ABS) trestles, the resonance peak was different for different places of the NdFeB permanent magnet. Besides, the maximum of the ME coefficient was 4.142 V/A at 32.2 kHz when the NdFeB permanent magnet was on top of the Terfenol-D layer. Compared with the ME coefficient with a DC magnetic field, the ME coefficient with NdFeB magnets still maintained high values in the frequency domain of 65~87 kHz in the ME structure with mica trestles. Through Fourier transform analysis of the transient signal, it is found that the phenomenon of multiple frequencies appeared at low field frequency but not at high field frequency. Moreover, the output ME voltages under different AC magnetic fields are shown. Changing the amplitude of AC magnetic field, the magnitude of the output voltage changed, but the resonant frequency did not change. Finally, a finite element analysis was performed to evaluate the resonant frequency and the magnetic flux distribution characteristics of the ME structure. The simulation results show that the magnetic field distribution on the surface of Terfenol-D is non-uniform due to the uneven distribution of the magnetic field around NdFeB. The resonant frequencies of ME structures can be changed by changing the location of the external permanent magnet. This study may provide a useful basis for the improvement of the ME coefficient and for the optimal design of ME devices.
机译：通过改变NdFeB永磁体的位置，研究了两种A线形状的Terfenol-D / PZT-5A结构的磁电效应。实验结果表明，两种ME复合结构均具有多个共振峰。对于带有丙烯腈-丁二烯-苯乙烯（ABS）支架的ME结构，NdFeB永磁体的不同位置的共振峰不同。此外，当NdFeB永磁体位于Terfenol-D层的顶部时，ME系数的最大值在32.2 kHz时为4.142 V / A。与具有直流磁场的ME系数相比，在具有云母架的ME结构中，NdFeB磁体的ME系数在65〜87 kHz的频域中仍保持较高的值。通过对瞬态信号进行傅立叶变换分析，发现在低频场频率下出现了多个频率现象，而在高频场频率下没有出现。而且，示出了在不同AC磁场下的输出ME电压。改变交流磁场的幅度，输出电压的幅度改变，但是谐振频率没有改变。最后，进行了有限元分析以评估ME结构的共振频率和磁通量分布特性。仿真结果表明，由于NdFeB周围磁场分布不均匀，使得Terfenol-D表面的磁场分布不均匀。可以通过改变外部永磁体的位置来改变ME结构的共振频率。这项研究可为提高ME系数和优化ME设备的设计提供有用的基础。

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