Magnetism in DMS: Cu-doped TiO thin films obtained by PLD

CLAUDIA RODRÍGUEZ TORRES; FEDERICO GOLMAR; A. FABIANA CABRERA; LEONARDO ERRICO; AZUCENA M. MUDARRA NAVARRO; MARIO RENTERÍA; FRANCISCO SÁNCHEZ; STELLA DUHALDE

Bariloche

Conferencia; 13th International Conference on Solid Films and Surfaces; 2006

CAB

In this work wepresent a study of the magnetic properties of pure and Cu-doped TiO2 anatase thin films deposited on LaAlO3 by pulsed laser deposition (PLD). The samples were characterized by X-ray absorption spectroscopy (XAS), X-ray diffraction (XRD) and the magnetic properties were measured using a SQUID. All films have a FM-like behaviour. In the case of the Cu-doped samples, the magnetic cycles are almost independent of the Cu concentration (in therange of 2.5 ? 10 at. % of Cu concentration). Cu atoms are forming CuO and/or substituting Ti in TiO2. Thethermal treatment promotes the CuO segregation. Since CuO is antiferromagnetic, the magnetic signals present in the films could be assigned to this Cusubstitutionally replacing cations in TiO2.