ISSN:
1434-6036
Keywords:
PACS. 74.72.Bk Y-based cuprates – 74.76.Bz High-Tc films – 68.55.Ln Defects and impurities: doping, implantation, distribution, concentration, etc. – 78.70.Dm X-ray absorption spectra
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: We report results of a time resolved X-ray Absorption Spectroscopy (XAS) experiment on the oxidation process of epitaxial Y1(Nd0.05Ba1.95)Cu3Ox superconducting thin films. For the first time Cu K-edge XAS technique has been used to explore local structural changes around the Cu ions during the oxidation process of a high critical temperature superconducting film. The results show that during the oxygenation of a tetragonal Y1(Nd0.05Ba1.95)Cu3Ox additional local transitions appear in the orthorhombic I phase, which are not linked to long range order transformations as shown by in situ X-ray diffraction experiment. New questions concerning the dynamic microscopic process leading to the oxygenation and eventually to superconductivity of the complex R1+xBa2-xCu3Ox (R = Y or rare earth) compounds arose from these results.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1140/epjb/e2002-00179-8
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