Fabrication of QFP devices from Au/SrTiO/sub 3//YBa/sub 2/Cu/sub 3/O/sub 7/ structures

Author

Hasegawa, H. ; Tarutani, Y. ; Fukazawa, T. ; Takagi, K.

Author_Institution

Adv. Res. Lab., Hitachi Ltd., Tokyo, Japan

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

4087

Lastpage

4090

Abstract

Quantum Flux Parametron (QFP) devices were fabricated from Au/SrTiO/sub 3//YBa/sub 2/Cu/sub 3/O/sub 7/ structures based on bicrystal grain boundary junctions. The junction connected to a load inductor in series was utilized as a sampling gate which reads out the load current. External fluxes were applied to two closed loops separately in the QFP by using two independent activation lines in order to reduce the load inductance. A multiplexer consisting of a couple of the QFPs and the sampling junction was fabricated and was tested at 6.5 K.

Keywords

analogue-digital conversion; barium compounds; gold; grain boundaries; high-temperature superconductors; multiplexing equipment; pulsed laser deposition; strontium compounds; superconducting logic circuits; yttrium compounds; 6.5 K; Au-SrTiO/sub 3/-YBa/sub 2/Cu/sub 3/O/sub 7/; Au/SrTiO/sub 3//YBa/sub 2/Cu/sub 3/O/sub 7/ structures; bicrystal grain boundary junctions; external fluxes; fabrication; independent activation lines; load current readout; load inductor in series; multiplexer; operating mode; pulsed laser ablation; quantum flux parametron devices; reduced load inductance; sampling gate; two closed loops; Electronics packaging; Fabrication; Gold; Inductance; Inductors; Josephson junctions; SQUIDs; Sampling methods; Superconducting magnets; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.783924

Filename

783924