Characterization of a high temperature superconducting oxide thin-film RF SQUID

Author

Daly, K.P. ; Silver, A.H. ; Simon, R.W. ; Platt, C.E. ; Lee, A.E. ; Wire, M.S. ; Zimmerman, J.E.

Author_Institution

TRW Space & Technol. Group, Redondo Beach, CA, USA

Volume

25

Issue

2

fYear

1989

fDate

3/1/1989 12:00:00 AM

Firstpage

1305

Lastpage

1308

Abstract

The authors have successfully fabricated and operated RF SQUIDs (superconducting quantum interference devices) made from thin films of the high-temperature superconducting oxide ErBa₂Cu₃O_7-x. The ideal triangular quantum interference pattern characteristics of RF SQUIDs are observed. The performance of a particular device, operating between 60 and 65 K, is described in detail. Except for a possible increase of noise due to operation close to T_c, the limited temperature range is shown to have no decisive practical disadvantage. The precise nature of the Josephson coupling in the device is unclear. It seems likely that Josephson coupling occurs between individual grains and probably within the microbridge

Keywords

SQUIDs; barium compounds; erbium compounds; high-temperature superconductors; superconducting thin films; 60 to 65 K; ErBa₂Cu₃O_7-x; Josephson coupling; RF SQUIDs; high temperature superconductor; microbridge; noise; thin films; triangular quantum interference pattern characteristics; Fabrication; High temperature superconductors; NIST; Radio frequency; SQUIDs; Silver; Space technology; Superconducting filaments and wires; Superconducting thin films; Thin film devices;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92534

Filename

92534