(i) When magnetic moments are aligned in parallel and antiparallel directions in unequal numbers it results in net moment. It is called ferrimagnetism. These substances are weakly attracted by magnetic field as compared to ferromagnetic substances. e.g. : Magnetite (Fe3O4)
(ii) Antiferromagnetic substances are expected to posses paramagnetism or ferromagnetism but actually they possess zero net magnetic moment. It is due to the presence of equal number of domains in opposite direction. e.g. : MnO.
