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標題: Fabrication and Properties of High-T-c YBCO Josephson Junction and SQUID With Variable Thickness Bridges by Focused Ion Beam
作者: Wu, C.H.
Jhan, F.J.
Chen, J.H.
Jeng, J.T.
Chen, K.L.
Yang, H.C.
Project: Ieee Transactions on Applied Superconductivity
期刊/報告no:: Ieee Transactions on Applied Superconductivity, Volume 21, Issue 3, Page(s) 375-378.
We have successfully fabricated YBCO Josephson junctions and SQUIDs with variable thickness bridges. The variable-thickness bridges of YBCO thin film were fabricated by photolithography and Focused ion beam mill. The Josephson effects of variable thickness bridges were obtained in a 80 nm-thick-film of high-T-c YBa2Cu3Oy. The Shapiro steps were observed in single junction in the gigahertz range from 3.02 to 14.64 GHz. The voltage-current and voltage-field characteristics were measured in SQUID magnetometer. The SQUID shows a peak-to-peak voltage swing of 1.5 mu V at 70 K. The properties of one junction and SQUID magnetometer have been investigated.
ISSN: 1051-8223
DOI: 10.1109/tasc.2010.2100352
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