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Electronic structure of La0.7Sr0.3MnO3 thin films for hybrid organic/inorganic spintronics applications (Articolo in rivista)
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- Electronic structure of La0.7Sr0.3MnO3 thin films for hybrid organic/inorganic spintronics applications (Articolo in rivista) (literal)
- Anno
- 2003-01-01T00:00:00+01:00 (literal)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- De Jong M.P., Dediu V., Taliani C. and Salaneck W. R. (literal)
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- ISI Web of Science (WOS) (literal)
- Titolo
- Electronic structure of La0.7Sr0.3MnO3 thin films for hybrid organic/inorganic spintronics applications (literal)
- Abstract
- Recently, hybrid organic/inorganic interfaces have been used in prototype spin valves, with thin films of La0.7Sr0.3MnO3 as the spin-polarized charge carrier injecting electrode. We have used x-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy to study the surface properties of La0.7Sr0.3MnO3 thin films prepared by the channel-spark ablation technique. In particular, preparation of the surfaces by annealing in ultra-high-vacuum surface segregation, the valence electronic structure and work function were studied in order to provide important information for charge injection behavior. It is shown that annealing in vacuum at T<500degreesC removes surface contamination and stabilizes oxygen content. The work-function values change from 4.2 to 4.8 eV depending on surface treatment. A surface layer consisting of SrO and SrCO3 of a few angstrom thick was found, which can significantly influence the spin injection properties at the interfacial region. (C) 2003 American Institute of Physics. (literal)
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