Inhomogeneity and irreversibility field of superconducting Nb-Ti tapes
| Autor: | V S Kruglov, S. V. Shavkin, V. V. Guryev |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Superconductivity
Phase transition Materials science Field (physics) Condensed matter physics 010308 nuclear & particles physics Physics QC1-999 Alloy engineering.material 01 natural sciences Magnetic field Vortex Condensed Matter::Superconductivity 0103 physical sciences engineering 010306 general physics Critical field |
| Zdroj: | EPJ Web of Conferences, Vol 185, p 08004 (2018) |
| ISSN: | 2100-014X |
| Popis: | Magnetizations and current-voltage characteristics of superconducting tapes from Nb-50% wt.Ti alloy are studied. In the region of external magnetic fields close to the upper critical field, there is a so called irreversibility field, which is often associated with the phase transition of vortex matter. However, in this study it is shown that the whole volume of experimental data can be described if we abandon the hypothesis of a phase transition and go over to the hypothesis of macroscopic inhomogeneity. This hypothesis implies the existence of two superconducting components with different upper critical fields, which naturally arise as a result of the production process. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|