Electromagnetic fields induced in a uniaxial multiferroic material by a point source or an ellipsoidal inclusion
Electromagnetic fields induced in a uniaxial multiferroic material by a point source or an ellipsoidal inclusion
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DOI：
10.1103/physrevb.73.184416
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发表时间：
2006-05
影响因子：
3.7
通讯作者：
L. Li;Jiangyu Li
中科院分区：
文献类型：
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作者：
L. Li;Jiangyu Li
多铁性材料同时具有两种或两种以上的偶联电场和磁场，使其具有丰富多样的微观结构现象和宏观性质。本文推导了单轴多铁性材料在点电或点磁电荷作用下的磁电格林函数的显式封闭表达式，并利用它们确定了多铁性材料中具有自发极化和磁化的椭球包涵体中的电磁场。数值结果表明，对于典型的多铁复合材料，电荷或自发极化更容易诱导磁场，这表明在这些复合材料中，磁场可能更容易操纵电极化。我们期望我们的解决方案在多铁材料的介观分析中有广泛的应用。
Multiferroic materials possess two or more types of orders simultaneously that couple the electric and magnetic fields, rendering them a rich variety of microstructural phenomena and macroscopic properties. In this paper, we derive explicit closed-form expressions of magnetoelectric Green’s functions for uniaxial multiferroic materials induced by a point electric or magnetic charge, and use them to determine the electromagnetic fields in an ellipsoidal inclusion with spontaneous polarization and magnetization embedded in a multiferroic material. Numerical results show that for a typical multiferroic composite, it is easier to induce magnetic field by electric charge or spontaneous polarization, suggesting that it is probably easier to manipulate the electric polarization by a magnetic field in those composites. We expect our solutions to have a wide range of applications in mesoscopic analysis of multiferroic materials.