INVESTIGADORES
SANCHEZ Francisco Homero
artículos
Título:
Study of Fe-doped rutile TiO2 alloys obtained by mechanical alloying
Autor/es:
A.F. CABRERA, C.E. RODRıGUEZ TORRES, L. ERRICO, F.H. SANCHEZ
Revista:
PHYSICA B - CONDENSED MATTER
Editorial:
Elsevier
Referencias:
Año: 2006 vol. 384 p. 345 - 347
ISSN:
0921-4526
Resumen:
Mixed TiO2-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 amagnetic moment estimated at 5.24 mB/Fe atom.