Characterisation of YBCO/Au/YBCO resistors for HTS Josephson noise thermometry

Author

Hao, L. ; Peden, D.A. ; Macfarlane, J.C. ; Gallop, J.C.

Author_Institution

Nat. Phys. Lab., Teddington, UK

fYear

2000

fDate

14-19 May 2000

Firstpage

703

Lastpage

704

Abstract

A crucial component of a resistive SQUID noise thermometer is the shunt resistor, which is required to have a value <0.1 m/spl Omega/. The problems of contact resistance between normal metal and HTS superconducting thin films have up to now hindered the implementation of an HTS resistive SQUID. Suitable Au/YBCO/Au shunt resistors /spl sim/20 /spl mu//spl Omega/ have recently been achieved and their characteristics under cryogenic operating conditions have been measured using the Josephson frequency-voltage relationship.

Keywords

Josephson effect; SQUIDs; barium compounds; contact resistance; gold; high-temperature superconductors; resistors; superconducting device noise; superconductor-normal-superconductor devices; temperature measurement; thermometers; yttrium compounds; HTSC Josephson noise thermometry; Josephson frequency-voltage relationship; YBaCuO-Au-YBaCuO; contact resistance; cryogenic operating conditions; equivalent circuit; resistive SQUID noise thermometer; shunt resistor; Contact resistance; Cryogenics; Electrical resistance measurement; Gold; High temperature superconductors; Resistors; SQUIDs; Superconducting device noise; Superconducting thin films; Yttrium barium copper oxide;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements Digest, 2000 Conference on

Conference_Location

Sydney, NSW, Australia

Print_ISBN

0-7803-5744-2

Type

conf

DOI

10.1109/CPEM.2000.851205

Filename

851205