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- W2045621490 abstract "Electron energy loss spectroscopy (EELS), high resolution transmission electron microscopy (HRTEM), and electron diffraction were used to investigate ${mathrm{Y}}_{2}{mathrm{O}}_{3}$ thin films epitaxially grown on (001) MgO substrate. In the vicinity of the film/substrate interface, HRTEM experiments evidenced the presence of grains with various crystallographic structures most of them crystallizing in the well-known $Ia3$ cubic phase. Some other grains, nanometric in size, and only observed in the vicinity of the film/substrate interface, have a different and unknown crystallographic structure. EELS spectra have been acquired close to the ${mathrm{Y}}_{2}{mathrm{O}}_{3}∕mathrm{Mg}mathrm{O}$ interface, to get a better knowledge of the phases nucleated close to the substrate surface. Spectra exhibiting different fine structures have been recorded and compared to multiple scattering calculations. The $Ia3$ phase has been detected as constituting the main component of the ${mathrm{Y}}_{2}{mathrm{O}}_{3}$ thin film in agreement with previous observations. It is found that calculations performed in a real space self-consistent full multiple scattering scheme (SC-FMS) and experiments are in pretty good agreement even for small cluster sizes. The second family of spectra has also been compared to calculations performed for monoclinic $C2∕m$ yttrium oxide, with a little success. Another approach considering a local oxygen neighboring close to a distorted rock-salt-like structure led to a good match between experimental and calculated spectra. Our results emphasize how powerful is the combination of spectroscopic measurements at nanometer scale, as feasible with EELS and modern microscopes, with ab initio calculations for structure determination at such small scale lengths." @default.
- W2045621490 created "2016-06-24" @default.
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- W2045621490 date "2005-09-16" @default.
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- W2045621490 title "Interfacial phases in epitaxial growth of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mi mathvariant=normal>Y</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>on MgO studied via combining electron energy-loss spectroscopy and real-space self-consistent full multiple scattering calculations" @default.
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- W2045621490 doi "https://doi.org/10.1103/physrevb.72.125425" @default.
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