Reducibility and magnetic properties of nanosized ZnO substituted Fe2O3/TiO2 system
Authors: Bahgat, M.; Khedr, M. H.; Abdelmaksoud, H. S.
Source: Materials Technology: Advanced Performance Materials, Volume 23, Number 1, March 2008 , pp. 39-44(6)
Publisher: Maney Publishing
Abstract:Pure Fe2O3 and TiO2 powder were mixed in molar ratio and fired in a muffle furnace at 1200°C for 4 h. The Fe2TiO5 compound formed was doped by replacing TiO2 with calculated amounts of ZnO (ZnO fractions x=0·2, 0·4, 0·6, 0·8 and 1). The synthesised samples were characterised with X-ray diffraction (XRD) and their magnetic properties were measured using a vibrating sample magnetometer. Fe2TiO5, 2FeZnTiO4, Fe2ZnTi3O10, ZnTiO3 and ZnFe2O4 phases were detected with very low magnetic properties corresponding to dilute magnetic semiconductors. Reduction tests in hydrogen at 500°C showed the reducibility of the undoped compound to be very low and to increase gradually with increasing Zn content in the ferrite phase. The reduction process caused a pronounced change in the magnetic properties.
Document Type: Research Article
Publication date: 2008-03-01