Giant-magnetoresistive/Superconducting contacts and Josephson junction devices

Author

Burnell, Gavin ; Leung, Chi-Wah ; Bell, Christopher ; Blamire, Mark G.

Author_Institution

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

Volume

15

Issue

2

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

904

Lastpage

907

Abstract

We have been investigating superconductor-normal metal-superconductor (SNS) (Proximity-Effect) Josephson Junctions in which the normal metal is a magnetic heterostructure in which the magnetic character can be actively controlled. As part of this program we have investigated the use of giant magnetoresistive (GMR) Cu-Py multilayers as the barrier in variable thickness planar bridge SNS junctions in addition to in-plane S-GMR contacts. In this paper we report on the latest results from our devices which have been fabricated using our established focussed ion beam (FIB) processes.

Keywords

Permalloy; contact resistance; copper alloys; focused ion beam technology; giant magnetoresistance; magnetic multilayers; magnetoresistive devices; proximity effect (superconductivity); superconductor-normal-superconductor devices; Cu-Ni_0.80Fe_0.20; FIB; GMR; Josephson junction devices; S-GMR contacts; SNS junctions; focussed ion beam processes; giant magnetoresistive multilayers; magnetic heterostructure; proximity-effect; superconducting contacts; superconductor-normal metal-superconductor; Bridges; Giant magnetoresistance; Josephson junctions; Magnetic materials; Magnetic multilayers; Niobium; Reflection; Superconducting devices; Superconducting epitaxial layers; Superconducting magnets; Josephson junctions; magnetoresistive devices;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.850111

Filename

1439785