BiSrCaCuO compounds rich in copper synthesized by molecular beam epitaxy structural and electric properties
| Autor: | C. Deville Cavellin, H. El Alami |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Nanostructure
Reflection high-energy electron diffraction Chemistry Mineralogy chemistry.chemical_element Condensed Matter Physics Epitaxy Copper Inorganic Chemistry Transmission electron microscopy Chemical physics Materials Chemistry Thin film High-resolution transmission electron microscopy Molecular beam epitaxy |
| Zdroj: | Journal of Crystal Growth. 277:170-174 |
| ISSN: | 0022-0248 |
| DOI: | 10.1016/j.jcrysgro.2004.12.030 |
| Popis: | We describe, here the growth, the structural and the electric properties of BiSrCaCuO compounds, where the same deposition sequence is used as for Bi-2212 with a single modification: the decrease of the bismuth deposition time in a wide range. It is observed experimentally that this last process leads to both nanostructuration and enrichment of copper compared to the conventional BiSrCaCuO compounds. The resulting complex nanostructure is in contrast with rather rough surfaces in the range of 10 nm as measured by atomic force microscopy, a strong c-axis texturation and a full epitaxy within the ab-plane as confirmed by four-circle X-ray diffraction. The local structure of the films was examined by high-resolution transmission electron microscopy (HRTEM) which allows determining the distribution of sizes of the domains. The results analysed using the theory of percolation show a 3D character of conductivity in the studied films. |
| Databáze: | OpenAIRE |
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