Title :
Electrical DC characteristics of textured BSCCO-2212 thin rods developed for current leads
Author :
Mora, M. ; Martinez, E. ; Angurel, L.A. ; Navarro, R.
Author_Institution :
Zaragoza Univ., Spain
fDate :
6/1/1999 12:00:00 AM
Abstract :
Textured Bi-2212 thin rods have been fabricated using a laser floating zone melting technique. Very high critical current densities, J/sub c/(77 K) >5000 A/cm/sup 2/, have been obtained in samples of 1 mm in diameter. Transport properties of these samples at temperatures between 65 and 77 K are reported. The results has been analysed assuming a flux flow mechanism for the appearance of the self field energy losses. A leading pinning mechanism associated with the planar junctions between grains have been considered.
Keywords :
bismuth compounds; calcium compounds; critical current density (superconductivity); flux flow; flux pinning; high-temperature superconductors; strontium compounds; texture; 1 mm; 65 to 77 K; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/; DC electrical characteristics; critical current density; current leads; flux flow mechanism; intergrain planar junctions; laser floating zone melting; pinning mechanism; self field energy losses; textured thin rods; transport properties; Annealing; Critical current density; High temperature superconductors; Laser beams; Magnetic field measurement; Magnetic materials; Microstructure; Optical materials; Scanning electron microscopy; Superconducting materials;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
