Intrinsic critical current densities in high temperature superconducting films

Author

Jiang, H. ; Widom, A. ; Huang, Y. ; Yuan, T. ; Vittoria, C.

Author_Institution

Northeastern Univ., Boston, MA, USA

Volume

28

Issue

5

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

2223

Lastpage

2225

Abstract

The enhancement of the quantum electrodynamic tunneling process due to normal current dissipation is proposed to explain the measured J_c results for YBCO films. The authors calculate the depairing current density for YBCO to be on the order of 10⁹ A/cm² and an upper limit of J_c to be on the order of 10⁷ A/cm². The estimates of J_c are in reasonable agreement with measured values of J_c. The model has been extended to include current flow through small constrictions comparable to the penetration depth, and J_c was found to be inversely proportional to its cross sectional area

Keywords

barium compounds; critical current density (superconductivity); high-temperature superconductors; penetration depth (superconductivity); superconducting thin films; superconductive tunnelling; yttrium compounds; YBaCuO; constrictions; critical current densities; cross sectional area; current dissipation; depairing current density; high-temperature superconductors; penetration depth; quantum electrodynamic tunneling process; superconducting films; Conductive films; Critical current density; Current density; Current measurement; Integrated circuit modeling; Superconducting films; Superconducting integrated circuits; Temperature; Tunneling; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.179450

Filename

179450