Finite element calculations of local current distribution in anisotropic superconductors in external and self-magnetic field

Author

Zeimetz, Bernhard ; Baranowski, Robert P. ; Evetts, Jan E.

Author_Institution

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

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

3355

Lastpage

3358

Abstract

Current flow in superconductors with nonlinear, anisotropic resistivity was studied using a finite element program. Current distribution, current-voltage curves and critical currents were calculated for different geometrical and electromagnetic parameters. `Brick-wall´ and `railway-switch´ geometries were compared. It was found that in both cases anisotropy of critical current, magnetic self field and external field all lead to inhomogeneous current flow. In extreme cases, only a small fraction of the superconducting volume is utilised for current transport. It is shown directly that critical currents determined in self magnetic field are sample size dependent

Keywords

critical currents; current distribution; finite element analysis; high-temperature superconductors; HTSC; anisotropic resistivity; anisotropic superconductors; brick-wall geometries; critical current; current flow; current-voltage curves; electromagnetic parameters; external magnetic field; finite element calculations; geometrical parameters; inhomogeneous current flow; local current distribution; railway-switch geometries; self-magnetic field; Anisotropic magnetoresistance; Conductivity; Critical current; Current distribution; Finite element methods; Geometry; Magnetic anisotropy; Perpendicular magnetic anisotropy; Superconducting magnets; Superconductivity;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919782

Filename

919782