Effect of Cd²⁺ Substitution on Structural-Magnetic and Dielectric Properties of Ni-Cu-Zn Spinel Ferrite Nanomaterials by Sol-Gel.

XRD Rietveld Refinement The XRD of the spinel ferrite system Cd x Ni 0.5− x Cu 0.2 Zn 0.3 Fe 2 O 4 (0 ≤ x ≤ 0.50, in steps of 0.10) was subjected to Rietveld refinement in order to further investigate the crystal structure of the samples, as shown in Figure 4 .The refinement results indicate that samples have an Fd-3m space group with increasing lattice constants and an increasing trend in the volume fraction of α-Fe 2 O 3 .

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