Fabrication of RS flip-flops using Y-Ba-Cu-O ramp-edge junctions and theiroperation

Citation
Jh. Park et al., Fabrication of RS flip-flops using Y-Ba-Cu-O ramp-edge junctions and theiroperation, IEEE APPL S, 11(1), 2001, pp. 932-935
Citations number
7
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
932 - 935
Database
ISI
SICI code
1051-8223(200103)11:1<932:FORFUY>2.0.ZU;2-O
Abstract
We fabricated single flux quantum RS flip-flop circuits by using ramp-edge Josephson junctions and tested their performance. The junctions were constr ucted with two Y1Ba2Cu3O7-x (YBCO) electrodes and a barrier layer, As barri er materials we used cobalt-doped YBCO, To insulate between YBCO layers we used Sr2AlTaO6(SAT) thin films. We also fabricated RS flip-flop circuits by using YBCO ground planes to reduce the inductance of YBCO film. The fabric ated Josephson junctions showed typical RSJ-like current-voltage (I-V) char acteristics above 50K. We could successfully demonstrate the correct operat ion of the RS flip-flop circuits at the temperatures near 50K, We used a co mputer controlled digital measurement set-up to test the circuits, The RS f lip-flop circuit fabricated on a ground plane showed more definite set and reset states on the voltage-flux(V-phi) modulation corves of the read SQUID than those of the circuit made without ground plane, This may be attribute d to the shielding effect by a YBCO ground plane.