Abstract
Stability of Hg-based superconducting thin films has been studied in air, acetone, alcohol, water, and thermal cycling. Tc, Jc, and surface micro structure s were analyzed as functions of exposure period. In dry air, fully reacted samples did not show degradation for a period of over one year, while samples which were not fully reacted due to air contamination or other reasons degraded within a few weeks. In humid air, samples were totally degraded within a few minutes. It has been found that the films degraded considerably in alcohol and acetone after they were immersed for a few hours, while this degradation was much severe in water. The mechanism of sample degradation has been discussed as well.
Original language | English |
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Pages (from-to) | 117-127 |
Number of pages | 11 |
Journal | Physica C: Superconductivity and its Applications |
Volume | 307 |
Issue number | 1-2 |
DOIs | |
State | Published - Oct 1 1998 |
Externally published | Yes |
Funding
We thank Dr. F. Xin and A.A. Gapud for their helpful discussions and H.G. Khym for reviewing this manuscript. This work is supported in part by USAFOSR Grant No. F49620-96-1-0358, NSF Grant No. DMR-9632279 and NSF EPSCoR fund.
Keywords
- Hg-1212
- Hg-1223
- High-temperature superconductivity
- Stability