High temperature characterization of the YBa2Cu3O9−y phase
| Autor: | M. van Sprang, Kazuo Kadowaki, A.A. Menovsky, Yingkai Huang, E. Salomons, A.C. Moleman |
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| Rok vydání: | 1987 |
| Předmět: |
Superconductivity
chemistry.chemical_classification Thermogravimetric analysis High-temperature superconductivity Inorganic chemistry General Engineering Analytical chemistry law.invention Thermogravimetry chemistry Electrical resistivity and conductivity law Differential thermal analysis Inorganic compound Ambient pressure |
| Zdroj: | Journal of the Less Common Metals. 136:169-173 |
| ISSN: | 0022-5088 |
| DOI: | 10.1016/0022-5088(87)90021-x |
| Popis: | We report the high temperature behaviour of single-phase YBa2Cu3O9 − y. This compound reveals superconductivity above 90 K. We performed high temperature (20–960 °C) resistivity measurements, differential thermal analysis and thermogravimetric analysis investigations. It was found that substantial oxygen depletion occurred above 420°C. The oxygen content changed reversibly with temperature at ambient pressure. The second-order-like transition around 650 °C, observed by differential thermal analysis, is an orthorhombic-tetragonal rearrangement of the lattice. These results are important for optimizing the processing conditions of this new class of high Tc superconducting compounds. |
| Databáze: | OpenAIRE |
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