Planar SNS Josephson junctions using multilayer Bi system

Kentaro Setsune; Koichi Mizuno; Hidetaka Higashino; Kiyotaka Wasa

doi:10.1117/12.25734

1 March 1991 Planar SNS Josephson junctions using multilayer Bi system

Kentaro Setsune, Koichi Mizuno, Hidetaka Higashino, Kiyotaka Wasa

Author Affiliations +

Proceedings Volume 1394, Progress In High-Temperature Superconducting Transistors and Other Devices; (1991) https://doi.org/10.1117/12.25734
Event: Processing Integration, 1990, Santa Clara, CA, United States

Abstract

Planar S/N/S Josephson junctions were successfully fabricated by multi-layered thin films of Bi-based high-Tc oxide superconductors. Two Bi2Sr2Ca1Cu2O(x) films and Bi2Sr2Cu1O(y) film were successively layered as superconducting electrodes and normal conducting buffer layer, respectively. These films were epitaxially deposited on (100) MgO substrate by in situ process of RF magnetron sputtering. Microjunction areas were defined by photolithography and Ar ion milling. These S/N/S type junctions clearly exhibited the AC Josephson effect under the irradiation of radio frequency waves of 12 GHz. More than 20th Shapiro steps were observed and those step heights were oscillated according to the irradiation power. These characteristics were stable and reproducible for different configuration of function area.

Citation Download Citation

Kentaro Setsune, Koichi Mizuno, Hidetaka Higashino, and Kiyotaka Wasa "Planar SNS Josephson junctions using multilayer Bi system", Proc. SPIE 1394, Progress In High-Temperature Superconducting Transistors and Other Devices, (1 March 1991); https://doi.org/10.1117/12.25734

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