Superconducting current leads of YBCO and Pb-BSCCO

Author

Gubser, D.U. ; Miller, M.M. ; Toth, L. ; Rayne, R. ; Lawrence, Selwyn ; Alford, McN ; Buttons, T.W.

Author_Institution

US Naval Res. Lab., Washington, DC, USA

Volume

27

Issue

2

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

1854

Lastpage

1857

Abstract

The authors fabricated and measured cylindrical superconducting current leads composed of a Y₁Ba₂Cu₃O ₇ (YBCO) and Bi_2-xPb_xSr₂Ca ₂Cu₃O₁₀ (Pb-BSCCO) that were approximately 20 cm long and 1 cm² in cross section. A steady-state, DC, critical current of 170 (230) A at a temperature of 77 K was measured for YBCO (Pb-BSCCO) using a voltage criterion of 2×10^-7 V (ρ=8×10^-10 Ω-cm). This current was limited by the current-induced self-magnetic field. At a temperature of 63 K this current increased to approximately 390 (465) A. The character of the magnetic field dependence of the critical current and shape of the current-induced voltage curves are different for the two materials

Keywords

barium compounds; bismuth compounds; calcium compounds; critical currents; high-temperature superconductors; lead compounds; strontium compounds; superconducting cables; yttrium compounds; 63 K; 77 K; Bi_2-xPb_xSr₂Ca₂Cu ₃O₁₀; Y₁Ba₂Cu₃O₇; critical current; current-induced self-magnetic field; current-induced voltage curves; cylindrical leads; high-temperature superconductors; magnetic field dependence; superconducting current leads; Bismuth; Critical current; Current measurement; Lead; Magnetic field measurement; Magnetic materials; Steady-state; Strontium; Voltage; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.133557

Filename

133557