Niobium-copper superconductor-normal metal-superconductor asymmetry modulated SQUIDs

Author

Burnell, Gavin ; Tarte, Edward J. ; Booij, Wilfred E. ; Blamire, Mark G.

Author_Institution

Dept. of Mater. Sci., Cambridge Univ., UK

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

1243

Lastpage

1246

Abstract

We have developed a fabrication method using a focused ion beam microscope that allows us to produce SNS junctions in which thermally energetic electrons can enter the N region. We report on SQUIDs made with this technique which we are developing as proof of concept devices and prototype high energy resolution spectrometers. We discuss the various design parameters used for our devices and present results from our prototype SQUIDs. We present results for devices with a variety of N-electrode structures and discuss their suitability for our application

Keywords

SQUIDs; copper; focused ion beam technology; inductance; niobium; superconducting device noise; superconductor-normal-superconductor devices; N-electrode structures; Nb-Cu; Nb/Cu superconductor-normal metal-superconductor asymmetry modulated SQUIDs; SNS junctions; design parameters; fabrication method; focused ion beam microscope; proof of concept devices; prototype high energy resolution spectrometers; thermally energetic electrons; Electron beams; Electron microscopy; Energy resolution; Fabrication; Ion beams; Josephson junctions; Prototypes; SQUIDs; Spectroscopy; Superconducting devices;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919575

Filename

919575