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In this paper, we will review some works on negative index metamaterials in magnetic composites, basically based on our recent works. First, we explore the condition of the existence of negative index meta-materials made of magnetic materials. We will point out that the left-handed materials in the magnetic materials are closely related to the wave polarization and magnetic damping. Then, the layer...
We have studied the effective index of refraction for guided wave mode in periodic ferrite-dielectric composite using the equivalent transmission line approach. For the different boundary conditions including PEC, PMC, impedance and periodic condition, we derive the dispersion equations and then calculate the effective index of refraction. We find that for the boundary conditions the negative index...
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