| Autor: |
Kim, D. C., Kim, J. S., Baranov, A. N., Park, Y. W., Pshirkov, J. S., Antipov, E. V. |
| Předmět: |
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| Zdroj: |
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics; 8/30/2002, Vol. 16 Issue 20-22, p3189, 4p |
| Abstrakt: |
Anomalous re-entrant superconducting-normal resistive transition was observed in Sr[sub0.4]K[sub0.6]BiO[sub3] superconductor i.e., normal-supernormal behavior as temperature is increased. Contrary to previously reported re-entrant resistive behaviors in other compounds, the re-entrant resistivity appearing at zero magnetic field in Sr[sub0.4]K[sub0.6]BiO[sub3] is suppressed to zero by applying an external magnetic field (H) or increasing the electrical transport current (I): an observation of a zero resistive superconducting state induced by H or I. Comparisons of the normal-state resistivity data in different samples indicate an important role that disorder in the junction barriers between superconducting grains might play on the observed re-entrant resistivity behavior. Possible physical origins of this anomalous phenomenon are discussed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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