Magnetized Plasma With Ferromagnetic Grains As A Tunable Left Handed Medium

The propagation of electromagnetic waves in a cold magnetized plasma with ferromagneticrngrains (MPFG) in the high frequency domain is studied. The MPFGrnmedium that consists of magnetized electron-ion plasma and ferromagnetic grains isrnassumed to be a homogeneous anisotropic medium. Its dispersion properties which isrncontrolled by the simultaneous characterization of the permittivity and permeabilityrntensors is investigated theoretically and numerically near the resonance frequency.rnIt is found that MPFG becomes transparent for the waves that cannot propagaternin conventional magnetized electron-ion plasma. The refractive index of the wavesrnpropagating parallel to the applied magnetic field is found to be negative for thernextraordinary wave in certain frequency domain. Moreover, by varying the parametersrnof the electric subsystem (electron-ion plasma), the nontransparent region forrnelectromagnetic wave propagation can be eliminated.rnThe results obtained show that in a narrow band of the super-high-frequency rangernnear the electron cyclotron frequency, the MPFG medium possesses all the knownrncharacteristics of negative refractive index media, which would make it as a viablernalternative medium to demonstrate the known and predicted peculiar properties ofrnmedia having negative index of refraction

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