Magnetic and structural study of Fe doped tin dioxide

BILOVOL V., MUDARRA NAVARRO A.M., RODRIGUEZ TORRES., C.E., SANCHEZ, F.H., AND CABRERA A.F.

Buenos Aires

Workshop; At the Frontiers of Condensed Matter IV: Current Trends and Novel Materials (FCM2008); 2008

 The structural and magnetic properties of Fe 10 at. % doped SnO2 powders milled for different times have been investigated. XAS results show a good dilution of Fe atoms in the rutile structure after 5 h of milling. Fe atoms have almost one oxygen vacancy near neighbour. At RT the sample presents the superposition of paramagnetic and ferromagnetic behaviours. When temperature decreases a progressive blocking process was observed. Below 100 K a shift of hysteresis loops is evident indicating magnetic coupling between ferromagnetic/antiferromagnetic phases.