Members of the YFe 1-xMn xO 3 (0≤x≤0.45) family crystallize in the GdFeO 3 type orthorhombic perovskite structure (space group Pnma) where the Fe and Mn ions are disordered at the 4b crystallographic site. Upon substitution of Mn at the Fe-site in the canted antiferromagnetic YFeO 3 (T N=640 K), a first-order spin-reorientation transition occurs at a temperature, T SR, where the magnetic structure changes from the canted to a collinear state. With increasing Mn-concentration, T SR increases whereas T N decreases. Neutron diffraction studies on the x=0.4 sample reveal that the spin structure changes from Γ 4 to Γ 1 below T SR. Intriguingly, when x=0.4 and 0.45, a temperature-induced magnetization reversal is observed below a compensation temperature T (T<T SR<T N). The reversal is explained on the basis of a ferrimagnetic ground state resulting from antiferromagnetic coupling of the canted moments of Fe-O-Fe and Mn-O-Mn with that of Fe-O-Mn ordering. © 2012 Elsevier Inc. All rights reserved.