XAS study of the local environment of impurities in doped TiO2 thin films

A.M. MUDARRA NAVARRO, RODRÍGUEZ TORRES, C. E., F. GOLMAR, A.F. CABRERA, L. A. ERRICO, M. RENTERÍA, AND F.H. SÁNCHEZ

Activity Report LNLS

Laboratorio Nacional de Luz Sincrotron

Año: 2006 p. 1 - 2

Recently, we reported the experimental observation of unexpected and significant RTF in Cu-doped TiO2 films [3], equivalent to what would be expected if, on the average, each Cu atom bears a magnetic moment of about 1.5 ìB. In order to clarify the role of impurities in the magnetism of DMS it is crucial to determine the local environment of magnetic and non magnetic impurities. In this work we present an EXAFS (Extended X-ray Absorption Fine Structure) and XANES (X-ray Absorption Near Edge Spectroscopy) characterization of the local environment of transition metal (TM)-doped anatase TiO2 thin films (TM=Co, Ni and Zn).