The effect of Mn2+ substitution on magnetic properties of MnxFe3−xO4 nanoparticles prepared by coprecipitation method

► Mn substituted magnetite nanoparticles were synthesized by coprecipitation method successfully. ► The nanoparticles have a decreasing Curie temperature with increasing Mn contents. ► Increase in Curie temperature explained based on changes in superexchange interactions.