Magnetism in Co-sputtered MnO–MoO2+ composite thin films

Abstract We have synthesized new composite of [MnO]x[MoO2+δ]1−x (0⩽x⩽1) co-sputtered films which are mainly composed of MnO nanocrystallites. The observed magnetic phase diagram of the composite is consistent with the change of film structure. Estimated numbers of magnetic moment from the measured paramagnetic Curie constant are less than the expected ones of Mn2+ ion, and hysteresis loop in magnetization curves is observed at 5 K . These results suggest the existence of random inhibition of antiferromagnetic superexchange interaction at the grain boundary by substitution of molybdenum ions.