The morphology, structure, and magnetic properties of the magnetic semiconductor ceramic Ilmenite-Hematite (IH), (1-x)Fe-TiO 3-xFe 2O 3, were studied as a function of the composition x. The magnetic ordering temperatures that we observed were consistently higher than those reported previously and were, for most of the composition range, above room temperature. We rule out the formation of Fe clusters as the origin of the magnetic properties. These magnetic properties of IH ceramics, in combination with their semiconducting characteristics, render them promising for spin-electronic applications. © 2006 The American Ceramic Society.
