Grain boundary Josephson effects in Y-Ba-Cu-O thick film prepared by spray pyrolysis technique

Autor:	D K Walia, A K Gupta
Rok vydání:	1991
Předmět:	Superconductivity Materials science Annealing (metallurgy) Metals and Alloys Analytical chemistry chemistry.chemical_element Condensed Matter Physics Oxygen Spray pyrolysis chemistry Materials Chemistry Ceramics and Composites Grain boundary Electrical and Electronic Engineering
Zdroj:	Superconductor Science and Technology. 4:650-653
ISSN:	1361-6668 0953-2048
Popis:	Superconducting films of YBa2Cu3O7-x with thickness ranging from 5 to 15 mu m have been grown on MgO(100) substrate by the spray pyrolysis technique followed by suitable annealing in flowing oxygen. A systematic study of the temperature dependence of Ic of the microbridges patterned on these films indicates that the grain boundary weak links behave as S/N/S junctions in microbridges having high Jc, while they behave as S/I/N/S or S/I/S junctions as the Jc of the microbridge is gradually decreased. Shapiro steps in I-V curves as well as SQUID behaviour in V- Omega curves are clearly observed in microbridges having low Jc but not in microbridges having high Jc.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f5f68eb49bc75f993975627bd74b180b https://doi.org/10.1088/0953-2048/4/11/026 Zobrazit plný text záznamu