THE TEMPERATURE DEPENDENCE OF RESISTANCE AND CRITICAL CURRENT IN GRANULAR YBa2Cu3Ox SUPERCONDUCTING FILMS
- 1 June 1989
- journal article
- research article
- Published by World Scientific Pub Co Pte Ltd in Modern Physics Letters B
- Vol. 03 (09) , 729-734
- https://doi.org/10.1142/s021798498900114x
Abstract
Temperature dependence of resistance R(T) and critical transport current I c (T) was measured for high-Tc YBa 2 Cu 3 O x granular thin films prepared by vacuum co-evaporation. The results are interpreted in terms of superconductor-constriction-superconductor (ScS) or superconductor-normal metal-superconductor (SNS) models, shown to be more adequate than the superconductor-insulator-superconductor (SIS) one. The films with nearly the same superconducting phase transition can exhibit both metallic (dR/dT>0) or semiconductor (dR/dTTcon. This is ascribed to intragranular defects which are shunted below T con .Keywords
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