Study of Fe doped rutile TiO2 alloys obtained by mechanical alloying

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

PHYSICA B - CONDENSED MATTER

Año: 2006 vol. 384 p. 345 - 347

0921-4526

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 Mo¨ ssbauer spectroscopy, X-ray diffraction and magnetometry experiments. The obtained phase was predominantly rutile Ti(Fe)O2 remaining a low percent of the initial hematite phase. In all vibrating sample magnetometer (VSM) curves a magnetic behavior and a paramagnetic contribution were observed at 300 K. The magnetic response could be attributed to Fe uncompensated moments in the hematite/rutile interface. On other hand, the paramagnetic contribution is associated to Fe substituting Ti in the rutile phase with a magnetic moment estimated at 5.24 mB/Fe atom.