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- W2550227697 abstract "The structural evolution of Sm nanoclusters on ultrathin film of Al2O3 epitaxially grown on Ni3Al(111) substrate at elevated temperatures was investigated in-situ using synchrotron radiation photoemission spectroscopy (SRPES), X-ray photoelectron spectroscopy (XPS) and scanning tunneling microscopy (STM). The vapor-deposited metallic Sm onto the Al2O3 thin film at 300 K is partially oxidized, leading to the appearance of both Sm2+ and Sm3+ states at low coverages, due to the charge transfer from Sm to oxide film. The complete oxidation of the Sm, i.e., all Sm2+ converted to Sm3+, occurs when the sample is annealed to 500 K. Further annealing results in the diffusion of Sm into the Al2O3 lattice. At ∼900 K, the formation of a SmAlO3 complex is observed. However, this complex starts to decompose and desorb from the surface at temperature higher than 1200 K. Interestingly, it is found that Sm can promote the oxidation of Ni3Al substrate and thicken the alumina film when Sm is deposited at room temperature onto the Al2O3/Ni3Al(111) substrate followed by annealing in oxygen environment at ∼800 K." @default.
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- W2550227697 date "2018-02-01" @default.
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- W2550227697 title "Temperature-induced structural evolution of Sm nanoparticles on Al2O3 thin film: An in-situ investigation using SRPES, XPS and STM" @default.
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- W2550227697 doi "https://doi.org/10.1016/j.apsusc.2016.11.145" @default.
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