DocumentCode
1434351
Title
Fabrication and Properties of High- 
YBCO Josephson Junction and SQUID With Variable Thickness Bridges by Focused Ion Beam
Author
Wu, Chiu-Hsien ; Jhan, Fong-Jyun ; Chen, Jau-Han ; Jeng, Jen-Tzong ; Chen, Kuen-Lin ; Yang, Hong-Chang
Author_Institution
Inst. of Nanosci., Nat. Chung Hsing Univ., Taichung, Taiwan
Volume
21
Issue
3
fYear
2011
fDate
6/1/2011 12:00:00 AM
Firstpage
375
Lastpage
378
Abstract
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-Tc 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 μV at 70 K. The properties of one junction and SQUID magnetometer have been investigated.
Keywords
SQUID magnetometers; barium compounds; focused ion beam technology; high-temperature superconductors; photolithography; superconducting junction devices; superconducting thin films; ytterbium compounds; Josephson effects; SQUID magnetometer; Shapiro steps; YBCO; YBCO thin film; focused ion beam mill; frequency 3.02 GHz to 14.64 GHz; gigahertz range; high-Tc YBCO Josephson junction; peak-to-peak voltage swing; photolithography; single junction; temperature 70 K; variable thickness bridges; voltage 1.5 muV; voltage-current; voltage-field characteristics; Bridge circuits; Josephson junctions; Junctions; Resistance; SQUIDs; Superconducting microwave devices; Yttrium barium copper oxide; Focused ion beam; Josephson junction; variable thickness bridges;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2010.2100352
Filename
5699961
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