%0 Conference Proceedings %T Momentum-dependent electromagnetic T-matrix and dynamic effective properties of random media %+ DAM Île-de-France (DAM/DIF) %+ CEA Le Ripault (CEA Le Ripault) %+ Institut FRESNEL (FRESNEL) %A Pellegrini, Yves-Patrick %A Thibaudeau, Pascal %A Stout, Brian %< avec comité de lecture %( Proceedings of the Fourth International Conference on Electrical Transport and Optical Properties of Inhomogeneous Media (ETOPIM 4) %B Fourth International Conference on Electrical Transport and Optical Properties of Inhomogeneous Media (ETOPIM 4) %C St Petersburg / Moscow, Russia %Y B. Abeles %Y A. Lagarkov %Y Ping Sheng %Y A.M. Dykhne %I Elsevier %3 Physica A: Statistical and Theoretical Physics %V 241 %N 1-2 %P 72-76 %8 1996-07-23 %D 1996 %R 10.1016/S0378-4371(97)00061-7 %K Random media: dielectric %K magnetic %K effective medium %K spatial dispersion %K multiple scattering %K T-matrix %K spheres %Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Conference papers %X We discuss the problem of the dynamic dielectric and magnetic response on the whole frequency range of a composite material. We derive exact one-body expressions of the momentum-dependent mean constitutive kernels, for an assembly of dielectric and magnetic spheres of finite size, on the basis of their T-matrix. The effective homogeneous-like constitutive constants are defined, and used in a Coherent Potential Approximation. In a second step, we solve the dispersion relation in order to extract observable quantities. %G English %L cea-00412640 %U https://cea.hal.science/cea-00412640 %~ CEA %~ CNRS %~ UNIV-AMU %~ IF %~ EC-MARSEILLE %~ DAM