Title :
Transport critical current in silver sheathed BiPbSrCaCuO tapes
Author :
Takahashi, C. ; Komatsu, M. ; Yaegashi, Y. ; Nagano, M. ; Takahashi, H. ; Hamada, K. ; Nagata, A.
Author_Institution :
Tohoku Electric Power Co. Inc., Sendai, Japan
fDate :
3/1/1993 12:00:00 AM
Abstract :
The temperature and magnetic field dependences of transport critical current density, J/sub c/, in silver-sheathed Bi/sub 2.1/Pb/sub 0.4/Sr/sub 2.2/Ca/sub 3.4/0/sub 4.2/ tapes have been studied. J/sub c/ was weakly dependent on magnetic fields at temperatures below 30 K. The effect of field-variation history on J/sub c/ was observed in the same temperature region. The magnetic field dependence of J/sub c/ and its anisotropy with respect to the field direction increased rapidly with increasing temperature. The irreversibility field and its anisotropy were also studied. Flux pinning and weak coupling properties are discussed.<>
Keywords :
bismuth compounds; calcium compounds; composite superconductors; critical current density (superconductivity); flux pinning; high-temperature superconductors; lead compounds; silver; strontium compounds; 5 to 77 K; Bi/sub 2.1/Pb/sub 0.4/Sr/sub 2.2/Ca/sub 3.4/O/sub 4.2/-Ag; critical current density; flux pinning; high temperature superconductivity; irreversibility field; magnetic field dependences; temperature dependence; weak coupling properties; Anisotropic magnetoresistance; Bismuth; Critical current; Critical current density; Flux pinning; History; Magnetic fields; Silver; Strontium; Temperature dependence;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
