Effect of thermal treatment in vacuum on Fe- doped SnO2 powders

V. BILOVOL, A.M. MUDARRA NAVARRO, C.E. RODRÍGUEZ TORRES AND A.F. CABRERA

Buenos Aires

Workshop; At the Frontiers of Condensed Matter V: Current Trends and Novel Materials (FCM2010); 2010

Sample of 10 at. % Fe-doped SnO2 powder was prepared by mechanical alloying and thermally treated at 773K in vacuum. The fit of the diffraction patterns and x-ray absorption spectroscopy results revealed that the milled sample was pure doped rutile. Fe dissolved in SnO2 was found in Fe2+/Fe3+ ionic valence with mainly paramagnetic behavior. After the thermal treatments all techniques indicate the formation of the ternary Sn0.36Fe2.64O4 spinel which is the responsible of the observed ferromagnetism