Structural, Electrical, and IR Properties of CuxCo1–xFe2O4 (x = 0, 0.4, 1.0) Prepared by Solid-State Method

Resumo

The effect of copper doping on cobalt ferrites Cu_xCo_1–xFe₂O₄ (x = 0, 0.4, 1.0) prepared by solid-state method was studied in detail. According to XRD results, the Co–Cu ferrites calcined at 800°C exhibited better crystallinity. Average crystallite sizes varied within the range 18–29 nm. The infrared spectra revealed two principal absorption bands, the high-frequency one ν₁ around 600 cm⁻¹ and the low-frequency one ν₂ around 400 cm⁻¹, attributed to stretching vibrations of the oxygen–metal bond in the tetrahedral (A) and octahedral (B) sites in the spinel lattice, respectively. The electrical properties of the material were semiconducting in their character. The results were used to obtain the following parameters: force constants for tetrahedral (K_t) and octahedral sites (K_o), Young’s modulus (E), rigidity modulus (G), bulk modulus (B), micro strain (ε), Debye temperature (Θ_D), X-ray density (ρ_X), dislocation density (ρ_D), transverse (V_t) and longitudinal (V_l) wave velocities.