Estimation of cation distribution in spinel ferrites Co1+xFe2―xO4 (0.0 ≤ x ≤ 2.0) using the magnetic moments measured at 10 K

Ferrite samples with the composition Co1+xFe2axO4 (0.0 less than or equal to x less than or equal to 2.0) were prepared by chemical co-precipitation. The samples exhibited an (A)[B]2O4 single phase cubic spinel structure. Magnetic measurements indicated that the saturation moment M of the samples at 10 K decreased from a maximum of 3.16 mu B/formula for x = 0.0 to a minimum of 0.0 mu B/formula for x = 2.0, with a local minimum at x = 1.4. The cation distribution of the samples was estimated by fitting dependence of M on x at 10 K. The Co ions content at the (A) sites estimated by us are close to the corresponding experimental results reported by Ferreira using Mossbauer spectrum.