Oxygen content of YBaCuO thin films
| Autor: | C. Audry, Jacques Perriere, A.C. Prieto, C. Belouet, J. Jiménez, D. Chambonnet, P. Martin, S. Degoy, O. Martinez |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Diffraction
Materials science Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element Condensed Matter Physics Oxygen Electronic Optical and Magnetic Materials symbols.namesake chemistry Distortion symbols Orthorhombic crystal system Electrical and Electronic Engineering Thin film Raman spectroscopy Dispersion (chemistry) Stoichiometry |
| Zdroj: | Physica C: Superconductivity. 256:291-297 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/0921-4534(95)00666-4 |
| Popis: | YBCO thin films are studied by means of Raman spectroscopy and X-ray diffraction. Data concerning oxygenation present significant dispersion as obtained from one or the other technique. This reveals structural distortion in addition to that induced by oxygen vacancies in the CuO chains. A linear relation between the frequency of the Raman mode associated with the stretching along the c-axis of the apical oxygen and the deviation of the perfect Ba and Cu stoichiometry is observed. A similar linear relation is obtained as well for the intensity ration of the high index reflections of the XRD spectrum (I006/I005). Such a relation is not seen for the c-axis lenght, which suggests that the structural distortion associated with departures from cation stoichiometry is different for c ∗ z[ Cu (2)] and c ∗ (1–2 z[ Cu (2)]) in the orthorhombic structure of YBCO. Other factors contributing to the uncertainty in the oxygen assessment in this films are discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect