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- W2522916121 abstract "Abstract In this paper, we investigated the physical properties especially the magnetic properties of the TiO 2 films and Au cluster doped TiO 2 films fabricated by sol-gel and sputtering methods combined experiments and first-principles calculations. All the samples annealed under air and N 2 atmosphere respectively exhibit room temperature ferromagnetism with the crystal phase of anatase. The values of the saturation magnetizations are in the order of Au δ-doped TiO 2 (annealed in N 2 )>undoped TiO 2 (annealed in air)>Au δ-doped TiO 2 (annealed in air). The first principles calculation results show that the formation energy of Au cluster doped TiO 2 films is lower than that of the oxygen vacancy and Au cluster codoped TiO 2 films. The effects of the Au cluster dopant are the retard of the formation of surface oxygen vacancy and the electrons transfer from 3d states of Ti atoms to Au 5d states in Au cluster doped TiO 2 films. The codoping of surface oxygen vacancies, bulk oxygen vacancies and Au clusters led to the spin-split of Ti 3d and O 2p in Au cluster doped TiO 2 films (annealed in N 2 ) which yield the highest saturation magnetization." @default.
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- W2522916121 date "2017-01-01" @default.
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- W2522916121 title "Effect of Au clustering on ferromagnetism in Au doped TiO2 films: theory and experiments investigation" @default.
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- W2522916121 doi "https://doi.org/10.1016/j.jpcs.2016.09.011" @default.
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