论文标题
有效的介质转化：分层磁结构的情况
Effective Medium Transformation: the Case of Stratified Magnetic Structures
论文作者
论文摘要
有效的培养基理论以均匀的方式代替了给定的优质异质结构，以使物理可测量的数量，例如反应场和损耗保持大致相同。这封信表明，物理问题的本质可能会随着均质化而改变。一个具体的例子是分层的非线性磁和导电介质，其中低频激发可引起涡流。结果表明，适当的粗尺度（同质）模型是对立的，具有磁静态的，具有有效的复杂估值BH曲线，其真实和虚构的部分代表样品中的主动和反应性损失。在其他物理和工程应用中可能会出现类似的情况，特别是在边界层的扩散问题中。
Effective medium theory replaces a given fine-scale heterostructure with a homogeneous one in such a way that the physically measurable quantities, e.g. reaction fields and losses, remain approximately the same. This Letter shows that the very nature of the physical problem may change upon homogenization. A specific example is a stratified nonlinear magnetic and conducting medium, where a low frequency excitation induces eddy currents. It is shown that the appropriate coarse-scale (homogeneous) model is, counter intuitively, magnetostatic, with an effective complex valued BH curve whose real and imaginary parts represent active and reactive losses in the sample. Similar situations may arise in other physical and engineering applications, notably, in diffusion problems with boundary layers.
