The present work describes the synthesis and characterization of Nd3+ doped magnesiummanganese ferrite nanoparticles. A series of magnesium-manganese ferrites having formula Mg0.9Mn0.1NdxFe2-xO4 (x = 0.1, 0.2, 0.3) has been prepared by SC method. X–ray study has predicted the single phase configuration of the present ferrite nanoparticles. The particle-size anticipated by means of Debye-Scherrer’s method is found to decrease (19.2- 13.5 nm). FTIR study has been carried out to understand the behaviour of M-O bonds stretching. The band gap has been viewed to increase (4.60-6.11 eV) with the increase in Nd3+ ions content.