Magnetized Plasma with Ferromagnetic Grains as a Tunable Left Handed Medium
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Date
2016-11
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Addis Ababa University
Abstract
The propagation of electromagnetic waves in a cold magnetized plasma with ferromagnetic
grains (MPFG) in the high frequency domain is studied. The MPFG
medium that consists of magnetized electron-ion plasma and ferromagnetic grains is
assumed to be a homogeneous anisotropic medium. Its dispersion properties which is
controlled by the simultaneous characterization of the permittivity and permeability
tensors is investigated theoretically and numerically near the resonance frequency.
It is found that MPFG becomes transparent for the waves that cannot propagate
in conventional magnetized electron-ion plasma. The refractive index of the waves
propagating parallel to the applied magnetic field is found to be negative for the
extraordinary wave in certain frequency domain. Moreover, by varying the parameters
of the electric subsystem (electron-ion plasma), the nontransparent region for
electromagnetic wave propagation can be eliminated.
The results obtained show that in a narrow band of the super-high-frequency range
near the electron cyclotron frequency, the MPFG medium possesses all the known
characteristics of negative refractive index media, which would make it as a viable
alternative medium to demonstrate the known and predicted peculiar properties of
media having negative index of refraction
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Keywords
Magnetized Plasma