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The dielectric permittivities(ε′ & ε″) and dielectric loss tangent(tan) are studied for the prepared samples CuFe2O4 and Cu1-xZnxGa0.1Fe1.9O4 spinel ferrites with(0.0 ≤ x ≤ 0.5) from room temperature up to 700K in the frequency range(102~105Hz).Dielec