Coherent phase locking of High-T-c YBa2Cu3Oy, Josephson junctions

Citation
Hc. Yang et al., Coherent phase locking of High-T-c YBa2Cu3Oy, Josephson junctions, IEEE APPL S, 11(1), 2001, pp. 308-311
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
ISSN journal
1051-8223 → ACNP
Volume
11
Issue
1
Year of publication
2001
Part
1
Pages
308 - 311
Database
ISI
SICI code
1051-8223(200103)11:1<308:CPLOHY>2.0.ZU;2-P
Abstract
We measured I-V curves and noise characteristics of high-T-c YBa2Cu3Oy step -edge Josephson junctions and serial junction arrays under microwave irradi ation. The junctions were fabricated on step-edge MgO(100) substrates with low step angles (similar to 30 degrees) The junction array shows the resist ively shunted junction (RSJ) behavior for at least 50 junctions and reveals a coherent phase locking under microwave irradiation. The variation of I-c was 16% for a 150-junctions array distributed along the step-edge line of 1.5 mm in width. The voltage noise, S-v, of the serial junction array scale s as the number of junctions, N. The value of S-IR, (S-IR = \(deltaI(c)/I-c )parallel to(deltaR/R)\), for a single and 50-junctions obtained from the f luctuation measurement is consistent with the result derived from IcRn prop ortional to (J(c))(q), with q = 0.5.