Critical current density versus normal-state resistivity in granular high-temperature superconductors with different average grain size
| Autor: | Jesús Maza, S. R. Currás, J.A. Veira, Félix Vidal |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Superconductivity
High-temperature superconductivity Materials science Condensed matter physics Metals and Alloys Condensed Matter Physics Grain size law.invention Electrical resistivity and conductivity law visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Grain boundary Ceramic Electrical and Electronic Engineering Critical field Sheet resistance |
| Zdroj: | Superconductor Science and Technology. 13:1005-1010 |
| ISSN: | 1361-6668 0953-2048 |
| DOI: | 10.1088/0953-2048/13/7/317 |
| Popis: | The resistivity, ρ, and the critical current density at zero applied magnetic field, Jc, of ceramic Y1Ba2Cu3O7-δ samples with different average grain size, a (from 5 to 14 µm), are reported. These results show that at a given temperature Jc depends only on the specific contact resistance of the average grain boundary junction, ρ, so that the product Jcρ is sample independent. The relevance of ρ and not of a on Jc has been further tested on a subset of samples having very different average grain size but similar ρ for which negligible variations of Jc are observed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|