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

Abstract Some of the electrical properties of chromium-substituted spinel Li 0.5 Cr x Fe 2.25− x O 4 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 Li 0.5 Cr x Fe 2.25− x O 4 have been investigated versus the composition x . The behavior of these can be satisfactorily described by a hopping mechanism of charge carriers between Fe 2+ and Fe 3+ ions on octahedral sites of the spinel lattice.