Some electrical characteristics of Li0.5CrxFe2.25−xO4 spinel structures

Some of the electrical properties of chromium-substituted spinel Li0.5CrxFe2.25−xO4 with 0.15≤x≤1.85, synthesized at 1200 °C for 12 h, are examined through impedance measurements and analysis. The electrical resistivity, relaxation frequencies and dielectric constant of Li0.5CrxFe2.25−xO4 have been investigated versus the composition x. The behavior of these can be satisfactorily described by a hopping mechanism of charge carriers between Fe2+ and Fe3+ ions on octahedral sites of the spinel lattice.