Title :
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
fDate :
3/1/1991 12:00:00 AM
Abstract :
The authors fabricated and measured cylindrical superconducting current leads composed of a Y1Ba2Cu3O 7 (YBCO) and Bi2-xPbxSr2Ca 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; Bi2-xPbxSr2Ca2Cu 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;
Journal_Title :
Magnetics, IEEE Transactions on
