DocumentCode
1237815
Title
YBa2Cu3OX submicron Josephson junctions on bicrystal substrates
Author
Volkov, Ivan A. ; Chuharkin, Maxim L. ; Snigirev, Oleg V. ; Ranchinski, Michail L.
Author_Institution
Phys. Dept., Moscow State Univ., Russia
Volume
13
Issue
2
fYear
2003
fDate
6/1/2003 12:00:00 AM
Firstpage
861
Lastpage
864
Abstract
A technological process based on e-beam lithography and ion beam etching of YBa2Cu3OX (YBCO) film through carbon mask is applied to fabricate a series of YBCO dc SQUIDs on SrTiO3 30°-bicrystal substrates. The width of Josephson junctions used in SQUIDs ranges from 0.6 μm to 1 μm. The character of the temperature dependence of the junctions critical current enables one to confirm the realization of d-wave pairing mechanism as well as the presence of localized states in the grain boundary region. The diffraction pattern of submicron junctions is discussed in relation to their further application in SQUIDs for task of scanning SQUID microscopy in high magnetic fields.
Keywords
Josephson effect; SQUIDs; barium compounds; bicrystals; electron beam lithography; grain boundaries; high-temperature superconductors; sputter etching; superconducting thin films; yttrium compounds; C; DC SQUID; SrTiO3; SrTiO3 bicrystal substrate; YBCO thin film; YBa2Cu3O; carbon mask; critical current; d-wave pairing; diffraction pattern; electron beam lithography; grain boundary; high temperature superconductor; ion beam etching; localized states; magnetic field; scanning SQUID microscopy; submicron Josephson junction; temperature dependence; Critical current; Etching; Grain boundaries; Ion beams; Josephson junctions; Lithography; SQUIDs; Substrates; Temperature dependence; Yttrium barium copper oxide;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2003.814068
Filename
1211740
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