Abstract
The effect of copper doping on cobalt ferrites CuxCo1–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 (Kt) and octahedral sites (Ko), Young’s modulus (E), rigidity modulus (G), bulk modulus (B), micro strain (e), Debye temperature (ΘD), X-ray density (ρX), dislocation density (ρD), transverse (Vt) and longitudinal (Vl) wave velocities.
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