Title :
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
fDate :
6/1/1999 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
