Ferromagnetism in doped-TiO2 thin films prepared by PLD

S. DUHALDE, C.E, RODRÍGUEZ TORRES, M. F. VIGNOLO, F. GOLMAR, C CHILLIOTE, A.F. CABRERA AND F. SÁNCHEZ

Journal of Physiscs-Conferences series

IOP PUBLISHING LTD

Año: 2007 vol. 59 p. 479 - 482

1742-6588

Transition-Metal-doped TiO2 thin films, with nominal composition Ti0.9TM0.1O2-äTransition-Metal-doped TiO2 thin films, with nominal composition Ti0.9TM0.1O2-ä (TM = Mn, Fe, Co, Ni, Cu), were grown by pulsed laser deposition (PLD), in order to study the role of dopants in the origin and significance of room temperature ferromagnetism in these systems. The crystallographic structures and their magnetic properties were characterized and the experimental results are compared to ab-initio calculations previously reported. The films are ferromagnetic at room temperature in the cases of Fe, Co, Ni and even Cu impurities, but not in the case of Mn doping. Our results support the hypothesis that oxygen vacancies play a key role in the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. are ferromagnetic at room temperature in the cases of Fe, Co, Ni and even Cu impurities, but not in the case of Mn doping. Our results support the hypothesis that oxygen vacancies play a key role in the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. are ferromagnetic at room temperature in the cases of Fe, Co, Ni and even Cu impurities, but not in the case of Mn doping. Our results support the hypothesis that oxygen vacancies play a key role in the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. are ferromagnetic at room temperature in the cases of Fe, Co, Ni and even Cu impurities, but not in the case of Mn doping. Our results support the hypothesis that oxygen vacancies play a key role in the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. are ferromagnetic at room temperature in the cases of Fe, Co, Ni and even Cu impurities, but not in the case of Mn doping. Our results support the hypothesis that oxygen vacancies play a key role in the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. he films are ferromagnetic at room temperature in the cases of Fe, Co, Ni and even Cu impurities, but not in the case of Mn doping. Our results support the hypothesis that oxygen vacancies play a key role in the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. results support the hypothesis that oxygen vacancies play a key role in the origin of magnetism in doped TiO2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. moments observed experimentally for films grown under different conditions. 2 films, and can explain the diversity of magnetic moments observed experimentally for films grown under different conditions. 1.