Structural and some magnetic properties of manganese-substituted lithium ferrites

► The XRD patterns reveal the spinel structure of the prepared ferrites. ► The lattice parameter 'a' and average grain diameter 'D' increase with increasing Mn2+ ion substitution. ► The experimental magnetic moment increases with manganese content up to x=0.5 and then tend to decrease for x>0.5. ► The increase in magnetic moment with manganese is attributed to Neel's two sublattice model. ► The decrease in magnetization for x>0.5 obeys Yafet-Kittel (Y-K) model.