J. R. Gavarri

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RuO(2) thin films have been deposited on Si substrates by spin coating with precursor solutions having a pH varying between 1.4 and 4. X-ray diffraction and transmission electron microscopy analyses are used to determine correlations between the solution pH and the film microstructure. As the pH varies, the RuO(2) crystal sizes reach a minimum value then(More)
CeO(2) thin films doped with neodymium oxides for application to gas sensors have been elaborated by the pulsed laser deposition technique. The films were deposited on orientated Si (100) substrates with variable deposition times (t = 90, 180 and 360 s) and molar fractions of Nd(2)O(3) (0, 6.5, 15, 21.5 and 27 at.%). The resulting Nd-CeO(2) thin films were(More)
2014 The crystal and magnetic structures of the lamellar FexTiSe2 (x = 0.25 and 0.48) antiferromagnets have been refined from neutron diffraction powder data at several temperatures ranging from 2 to 300 K. For both compounds, Ti is found to be substituted for 8 % of Fe so that the separation of the two metals is not complete. The distortion of the(More)
To better understand the role of crystal structures and local disorder in the photonic properties of the system (1 - x)CaWO4  - xCdWO4 with 0 < x < 1, two specific phases with compositions x = 0.5 (scheelite phase) and 0.8 (wolframite phase) have been studied by scanning and transmission electron microscopies. High-resolution electron microscopy images and(More)
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