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 IV; 2010

Comisión Nacional de Energía Atómica

A sample of 10 at. % Fe-doped SnOB2B powder was prepared by mechanical alloying and then thermally treated at 773K in vacuum. The fit of the diffraction patterns and X-ray absorption spectroscopy measurements revealed that the as milled sample was pure doped rutile. Fe dissolved into SnOB2B was found in Fe2+ P/Fe3+ ionic valence with mainly paramagnetic behavior. After the thermal treatment all techniques indicate the formation of the ternary SnB0.36BFeB2.64OB4B spinel phase which is the responsible of the observed ferromagnetism.