Title :
Experimental analysis of superconducting properties of Y-Ba-Cu-O/Ag proximity interfaces
Author :
Fujimaki, A. ; Takai, Y. ; Hayakawa, H.
Author_Institution :
Dept. of Electron., Nagoya Univ., Japan
fDate :
3/1/1991 12:00:00 AM
Abstract :
The electrical properties of YBa2Cu3O7-y/Ag proximity interfaces are reported. In order to study these properties, SNS (superconductor/normal metal/superconductor) junctions made of YBa2Cu3O 7-y/Ag/Nb thin films and SNIS (superconductor/normal metal/insulator/superconductor) junctions made of YBa2Cu3O7-y/Ag/AlOx/Nb thin films were examined. Experimental results on the SNS junctions imply that weak links are formed inside YBa2Cu3O7-y and that the junction properties depend on the area of the surface nonsuperconducting phases. The Jc-R n relationship and the Rn-T characteristics suggest the presence of nonsuperconducting phases grown partially on the YBa2Cu3O7-y surfaces. The results on the SNIS junctions show little superconductivity induced in the Ag layers by the YBa2Cu3O7-y films
Keywords :
aluminium compounds; barium compounds; electronic conduction in insulating thin films; high-temperature superconductors; niobium; proximity effect; silver; superconducting junction devices; type II superconductors; yttrium compounds; Jc-Rn relationship; Rn-T characteristics; YBa2Cu3O7-y-Ag-AlOx -Nb; YBa2Cu3O7-y-Ag-Nb; electrical properties; high temperature superconductors; proximity interfaces; superconducting properties; surface nonsuperconducting phases; type II superconductors; weak links; Conducting materials; Conductive films; High temperature superconductors; Niobium; Proximity effect; Superconducting devices; Superconducting films; Superconducting thin films; Superconductivity; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
