IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Ferromagnetism in doped TiO2 thin films prepared by PLD
Autor/es:
S DUHALDE , C E RODRÍGUEZ TORRES, M F VIGNOLO, F GOLMAR, C CHILLOTE, A F, CABRERA, AND F H SÁNCHEZ
Revista:
Journal of Physics: Conference Series
Editorial:
IOP Publishing
Referencias:
Año: 2007 vol. 59 p. 479 - 482
ISSN:
1742-6588
Resumen:
Transition-Metal-doped TiO2 thin films, with nominal composition Ti0.9TM0.1O2-􀁇(TM = Mn, Fe, Co, Ni, Cu), were grown by pulsed laser deposition (PLD), in order to study therole of dopants in the origin and significance of room temperature ferromagnetism in thesesystems. The crystallographic structures and their magnetic properties were characterized andthe experimental results are compared to ab-initio calculations previously reported. The filmsare ferromagnetic at room temperature in the cases of Fe, Co, Ni and even Cu impurities, butnot in the case of Mn doping. Our results support the hypothesis that oxygen vacancies play akey role in the origin of magnetism in doped TiO2 films, and can explain the diversity ofmagnetic moments observed experimentally for films grown under different conditions.