This paper introduces a continuum microelectromagnetic theory (also called micromorphic electromagnetic theory), to discuss electromagnetic phenomena in bodies with microstructures. Balance laws of microelectromagnetic media of the first-grade are given. Constitutive equations are developed. The field equations are obtained . It has been shown that, this theory gives rise to several new vector and tensor waves. A theorem of conservation of energy (Poynting type) is proved. Dispersion relations are obtained for both vector and tensor waves. Relations of tensor waves to microscopic phenomena (such as spin waves) are discussed.
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Eringen, A.C. Micromorphic Electromagnetic Theory and Waves. Found Phys 36, 902–919 (2006). https://doi.org/10.1007/s10701-006-9044-1
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DOI: https://doi.org/10.1007/s10701-006-9044-1