A model and equivalent circuit for a superconducting flux flow transistor

Author

Martens, J.S. ; Ginley, D.S. ; Beyer, J.B. ; Nordman, J.E. ; Honenwarter, G.K.G.

Author_Institution

Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA

Volume

1

Issue

2

fYear

1991

fDate

6/1/1991 12:00:00 AM

Firstpage

95

Lastpage

101

Abstract

A three-terminal high-frequency active device made of a single film of a high T/sub c/ superconductor that is based on the magnetic control of flux flow is presented. The device is composed of parallel weak links with a nearby magnetic control line. A model has been developed that is based on solving the equation of motion of Abrikosov vortices subject to Lorentz viscous and pinning forces, as well as magnetic surface barriers. The model has been used to predict device transit time (computed from flux velocity) and device I-V curves. The predictions are compared to measured parameters with resulting very good agreement.<>

Keywords

equivalent circuits; flux flow; high-temperature superconductors; superconducting junction devices; Abrikosov vortices; Lorentz forces; device transit time; equivalent circuit; flux flow; high T/sub c/ superconductor; magnetic control; magnetic control line; magnetic surface barriers; model; parallel weak links; pinning forces; superconducting flux flow transistor; three-terminal high-frequency active device; viscous forces; Equations; Equivalent circuits; High temperature superconductors; Laboratories; Magnetic devices; Magnetic films; Magnetic flux; Predictive models; Superconducting films; Superconducting magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.84615

Filename

84615