Study of Fe doped rutile TiO2 alloys obtained by mechanical alloying

A. F. CABRERA, C. E. RODRÍGUEZ TORRES, F. H. SÁNCHEZ Y L. ERRICO.

Reñaca, Chile

Workshop; VII Latin American Workshop on Magnetism, Magnetic Materials, and their Applications (LAW3M-05; 2005

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Mixed TiO2-a-Fe2O3 powders with 10 at. % of  Fe were prepared by high-energy ball milling. The influence of the preparation method was studied by Mössbauer spectroscopy, X-ray diffraction and magnetometry experiments. The obtained phase was predominantly rutile Ti(Fe)O2, remaining a few percent of the initial hematite phase. In all VSM (no esta definida la sigla) curves taken at 300 K, a magnetic behavior and a paramagnetic contribution were observed. The magnetic response could be attributed to Fe uncompensated moments in a hematite/rutile interface. On the other hand, the paramagnetic contribution was associated to Fe substituting Ti in the rutile phase with a magnetic moment of 5.24 mB/Fe.