Cr substituted Cd-Cu nanoferrite materials (Cd 0.5 Cu 0.5 Cr x Fe 2-x O 4 with x = 0.0, 0.05, 0.1, 0.2, 0.4, and 0.8) were successfully fabricated by the co-precipitation technique. XRD, TGA, and DC electrical measurements were utilized to identify the synthesized nano samples.According to an XRD analysis, the obtained samples are cubic structures with space group Fd3m. The estimated crystallite size by the Scherrer formula is in the range of 14.8-22.6 nm. However, the SEM measurements revealed that the nanoparticles' estimated particle sizes ranged from 37.5 to 52.5 nm. As indicated by TGA graphs, the average decomposition energies of the four stages of the weight loss of decomposition are 1.39, 6.53, 39.14, and 40.21 (KJ/mol). The room temperature conductivity decreased gradually from 7.34 × 10 -7 Ω -1 cm -1 for the Cr00 sample to 2.24 × 10 -8 Ω -1 cm -1 for the Cr80 sample, while the values of activation energy were found in the range from 0.349-0.407 eV. The temperature-dependent of dc-electrical conductivity for all the samples exhibits semiconductor-like behavior. As a result, Cd-Cu doped materials may be suitable for limiting eddy current losses.