Fe2O3, CoFe2O4, CuFe2O4, MnFe2O4 and NiFe2O4 films were prepared by a nonaqueous sol method. The sols were prepared by dissolving 10% by weight of the corresponding nitrates in ethylene glycol and heating the solution at 85 degrees C under nitrogen. F3O4 films were prepared by reducing the initial Fe2O3 films in H-2/Ar (10/90).