| Autor: |
Seppo Leppävuori, L. Kowaliewicz, J. Levoska, A.B. Kozyrev, O.G. Vendik, S. F. Karmanenko, T.B. Samoilova |
| Rok vydání: |
1990 |
| Předmět: |
|
| Zdroj: |
Journal of the Less Common Metals. :1240-1247 |
| ISSN: |
0022-5088 |
| DOI: |
10.1016/0022-5088(90)90542-r |
| Popis: |
Microwave surface resistance, Rs, at a frequency of 60 GHz, current-voltage characteristics and critical currents of superconducting YBaCuO sputtered thin films with different microstructures and degrees of orientation'were investigated. Films grown on epitaxial BaxSr1 − xTiOgMgO(100) substrates with a thickness of between 250 and 450 nm were highly c-axis oriented and they had the highest value of critical current (~ 106 A/cm2 at 77 K) and the lowest value of rs (~ 10'−2Ω at T ≤ 70 K). The possible mechanisms of the destruction of superconductivity and Rs formation in the films are discussed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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