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Effect of noble metal buffer layers on superconducting YBa/sub 2/Cu/sub 3/O/sub 7/ thin films

Journal Article · · Appl. Phys. Lett.; (United States)
DOI:https://doi.org/10.1063/1.98979· OSTI ID:5681399

Superconducting YBa/sub 2/Cu/sub 3/O/sub 7/ thin films have been prepared by using a magnetron sputtering system in the single-source mode. Samples deposited on (100) single-crystal MgO with and without a Au buffer layer all show high transition temperatures (82--87 K). The use of a Au buffer layer significantly improves the superconducting properties, particularly the Meissner effect and critical current density (3.3 x 10/sup 6/ A/cm/sup 2/ at T = 2 K and 3.5 x 10/sup 4/ A/cm/sup 2/ at T = 77 K). The Au films remain metallic after high-temperature annealing in an oxygen atmosphere. We propose to use Au buffer layers as current shunts to protect superconducting films and devices.

Research Organization:
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218
OSTI ID:
5681399
Journal Information:
Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 51:25; ISSN APPLA
Country of Publication:
United States
Language:
English

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