Processing and some properties of biferroic Bi5 Ti3 FeO15 ceramics J. Rymarczyk, D. Machura and J. Ilczuk Eur. Phys. J. Special Topics, 154 (2008) 187-190 Published online: 15 March 2008 DOI: 10.1140/epjst/e2008-00542-1