Title :
Critical current anisotropy and AC losses in Bi(Pb)SrCaCuO-2223 and TlBaCaCuO-2212 Ag sheathed superconducting tapes
Author :
Jansak, L. ; Chovanec, F. ; Kokavec, J. ; Jergel, M.
Author_Institution :
Inst. of Electr. Eng., Slovak Acad. of Sci., Bratislava, Slovakia
fDate :
7/1/1996 12:00:00 AM
Abstract :
The dependence of the critical current as well as the AC self-field losses on the orientation of the external DC magnetic field of Bi(Pb)SrCaCuO-2223 and TlBaCaCuO-2212 Ag sheathed superconducting tapes prepared by the powder-in tube method was studied at 77 K. The self-field losses were measured using different voltage-tap configurations and different electrical measuring methods in the frequency range 5-400 Hz and superimposed DC magnetic fields up to 0.2 T. The emphasis has been laid on the field 0.05 T where B(Pb)SCCO samples exhibited a strong critical current anisotropy while TBCCO ones were practically isotropic. The interpretation of the experimental results is presented
Keywords :
barium compounds; bismuth compounds; calcium compounds; critical current density (superconductivity); high-temperature superconductors; lead compounds; silver; strontium compounds; superconducting tapes; thallium compounds; (BiPb)2Sr2Ca2Cu3O 10-Ag; 0.05 T; 0.2 T; 5 to 400 Hz; 77 K; AC losses; Bi(Pb)SrCaCuO-2223 Ag sheathed superconducting tapes; Tl2Ba2CaCu2O8-Ag; TlBaCaCuO-2212 Ag sheathed superconducting tapes; critical current anisotropy; high temperature superconductor; powder-in tube method; self-field losses; strong critical current anisotropy; voltage-tap configurations; Anisotropic magnetoresistance; Annealing; Conductors; Critical current; Current measurement; Frequency measurement; High temperature superconductors; Magnetic field measurement; Powders; Superconducting films;
Journal_Title :
Magnetics, IEEE Transactions on
