A two-dimensional model for magnetic-field-direction dependent magnetoelectric effect in laminated composites
A two-dimensional model for magnetic-field-direction dependent magnetoelectric effect in laminated composites
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DOI：
10.1063/1.4938113
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发表时间：
2015-12
影响因子：
3.2
通讯作者：
H. Yao;Yangyi Shi;Yuanwen Gao
中科院分区：
文献类型：
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作者：
H. Yao;Yangyi Shi;Yuanwen Gao
实验表明，磁场方向对层合复合材料的磁电效应有重要影响。本文在平均场法的基础上，建立了二维磁场方向相关的ME模型。数值计算结果与以往的实验数据进行了比较，具有良好的相关性。特别是从理论上证明了最优角的存在性，该角随直流磁场的大小而变化，能使电磁响应达到最佳。同时，我们发现最优磁场随角度呈明显的非线性变化。预测结果比以往的研究结果更接近实验数据。此外，预测结果表明共振磁电效应与低频时的趋势相同。在共振频率下，ME系数提高了约100倍。
Experiments have shown that the direction of magnetic field plays an important role in magnetoelectric (ME) effect in laminated composites. In this paper, based on the average field method, a two-dimensional magnetic-field-direction dependent ME model is introduced. The numerical results were compared with previous experimental data with excellent correlation. Especially, the existence of an optimal angle is theoretically proved, which is changed with the value of DC magnetic field and can drive ME response to the best. Meanwhile, we found that the optimal magnetic field presents an obvious nonlinear variation with the angle. The prediction is closer to the experimental data than that given in previous work. Furthermore, the predictions show that the resonance magnetoelectric effect has the same trend with that at low frequency. ME coefficients are increased by about 100 times at resonance frequency.