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The present work is focused on the effect of Fe3+ replacement by rare earth-Ho3+ ions and their influence on the properties of MnFe2O4 ferrite. The Ho3+ substituted MnFe2O4 ferrite samples with chemical formula MnHoxFe2−xO4 were synthesized where substitution concentration of Ho3+ was 0.0, 0.05, 0.1 and 0.15. The samples were synthesized by the self-ignited sol–gel method using the nitrates of the respective elements. Powder X-ray diffraction, transmission electron microscopy, infrared spectroscopy, vibrating sample magnetometer (VSM) and electrical measurements were employed to characterize the structural, magnetic and electrical properties of these ferrite nanoparticles. The cations distribution between the tetrahedral (A-site) and octahedral sites (B-site) has been estimated by XRD analysis. It is found that substitution of Ho3+ ions favorably influenced the magnetic and electrical properties …