Measurements of the Delay Time Between a Critical Current Pulse and the First Resistive Response in Superconducting Niobium Strips
| Autor: | Khalil Harrabi, J. P. Maneval |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Superconductivity
Physics Resistive touchscreen Condensed matter physics Phonon Niobium chemistry.chemical_element 02 engineering and technology STRIPS 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials law.invention Pulse (physics) Amplitude chemistry law 0103 physical sciences Electrical and Electronic Engineering 010306 general physics 0210 nano-technology Delay time |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 27:1-4 |
| ISSN: | 1558-2515 1051-8223 |
| DOI: | 10.1109/tasc.2016.2637866 |
| Popis: | We have measured in superconducting niobium filaments the delay time $\text{t}_{d}$ that separates the initiation of a pulse of overcritical current $(\text{I} > \text{I}_{c})$ from its first resistive response. The experiments were performed at various temperatures, typically 4, 5, and 6 K, well below the critical temperature T $_{c}$ , for delays in the range 0.3 ns $ t $_{d}$ $ 80 ns, divided into two parts for technical reasons. The data t $_{d}$ (T/T $_{c}$ , I/I $_{c}$ ) were analyzed through a time-dependent Ginzburg–Landau theory leaving the gap relaxation time $\tau _{d}$ as an unknown parameter. In a restricted range of current amplitudes (I/I $_{c}$ $ 1.15), a fit is obtained by choosing $\tau _{d}$ between 1.65 and 1.75 ns, which we interpret as a film cooling time of 23 ps per nm thickness, almost independently of the temperature. |
| Databáze: | OpenAIRE |
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