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首页> 外文期刊>Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on >An analytical nonlinear model for laminate multiferroic composites reproducing the DC magnetic bias dependent magnetoelectric properties
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An analytical nonlinear model for laminate multiferroic composites reproducing the DC magnetic bias dependent magnetoelectric properties

机译：多层多铁复合材料的重现依赖于直流磁偏置的磁电特性的解析非线性模型

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摘要

In this work, we propose an analytical nonlinear model for laminate multiferroic composites in which the magnetic-field-induced strain in magnetostrictive phase is described by a standard square law taking the stress effect into account, whereas the ferroelectric phase retains a linear piezoelectric response. Furthermore, differing from previous models which assume uniform deformation, we take into account the stress attenuation and adopt non-uniform deformation along the layer thickness in both piezoelectric and magnetostrictive phases. Analysis of this model on L-T and L-L modes of sandwiched Terfenol-D/lead zirconate titanate/Terfenol-D composites can well reproduce the observed dc magnetic field (Hdc) dependent magnetoelectric coefficients, which reach their maximum with the Hdc all at about 500 Oe. The model also suggests that stress attenuation along the layer thickness in practical composites should be taken into account. Furthermore, the model also indicates that a high volume fraction of magnetostrictive phase is required to get giant magnetoelectric coupling, coinciding with existing models.
机译：在这项工作中，我们提出了一种多层多铁复合材料的分析非线性模型，其中考虑了应力效应，通过标准平方定律描述了磁致伸缩相中的磁场感应应变，而铁电相保留了线性压电响应。此外，与先前假设均匀变形的模型不同，我们考虑了应力衰减并在压电和磁致伸缩阶段均沿层厚度采用了非均匀变形。将该模型对夹在中间的Terfenol-D /锆钛酸铅/ Terfenol-D复合材料的LT和LL模式进行分析可以很好地再现观察到的直流磁场（H dc ）相关的磁电系数，该系数达到最大值H dc 全部约500 Oe。该模型还建议应考虑实际复合材料沿层厚度的应力衰减。此外，该模型还表明，要实现巨大的磁电耦合，就需要大量的磁致伸缩相，这与现有模型是一致的。

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