YBCO Josephson Junctions and Striplines for RSFQ Circuits Made by Ion Irradiation

Author

Wolf, Tilman ; Bergeal, N. ; Lesueur, J. ; Fourie, Coenrad J. ; Faini, G. ; Ulysse, C. ; Febvre, P.

Author_Institution

Lab. de Phys. et d´Etude des Mater., Univ. Pierre et Marie Curie, Paris, France

Volume

23

Issue

2

fYear

2013

fDate

4/1/2013 12:00:00 AM

Firstpage

1101205

Lastpage

1101205

Abstract

We have investigated the electrodynamic properties of high-Tc Josephson junctions (JJs) and striplines made by ion irradiation in order to evaluate the potential of such a technology for low-power rapid single flux quantum superconductor digital electronics. The process is briefly presented, together with the JJ characteristics in the context of high-speed electronics. Line inductances of different geometries and at different temperatures have been measured through superconducting quantum interference device (SQUID) modulation. A detailed comparison with 3-D numerical calculations has been made, and a quantitative agreement that shows typical values of 4-8 pH per square without a ground plane, depending on linewidth and the gap to the ground line, has been obtained.

Keywords

ion beam effects; superconducting junction devices; yttrium compounds; 3D numerical calculation; RSFQ circuit; SQUID modulation; YBCO; YBCO Josephson junction; YBCO stripline; electrodynamic property; ground line; high-T_c Josephson junction; high-speed electronics; ion irradiation; line inductance; low-power rapid single flux quantum superconductor digital electronics; superconducting quantum interference device modulation; Current measurement; Inductance; Josephson junctions; Junctions; Radiation effects; SQUIDs; Temperature measurement; High-temperature superconductors; ion irradiation junctions; numerical inductance calculation; stripline inductance;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2012.2237513

Filename

6466450