Sample size dependence and irreversibility of the critical current density of ceramic high-temperature superconductors

Author

Muller, K.-H. ; Matthews, D.N.

Author_Institution

CSIRO Div. of Appl. Phys., Sydney, NSW, Australia

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

1229

Lastpage

1231

Abstract

The intergranular critical state model is employed to calculate the sample-size dependence of the transport critical current density of polycrystalline high-temperature superconductors. Good agreement with experimental data has been found. The generalized London equation is used to determine the Josephson current across grain boundaries when magnetic flux is trapped inside grains. The field at which the critical current density peaks when the applied field is decreased under zero field cooled (ZFC) conditions is predicted and agrees well with experimental observations.<>

Keywords

Josephson effect; ceramics; critical current density (superconductivity); grain boundaries; high-temperature superconductors; Josephson current; London equation; ceramic high-temperature superconductors; critical current density; grain boundaries; intergranular critical state model; irreversibility; polycrystalline; sample-size dependence; Boundary conditions; Ceramics; Critical current density; Current measurement; Equations; Grain boundaries; High temperature superconductors; Josephson effect; Magnetic field measurement; Slabs;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233403

Filename

233403