Title :
Ic - B - T Evaluation for High-Tc Superconductors in Pressurized/Depressurized Liquid Nitrogen
Author :
Nishijima, Gen ; Tsuchiya, Y. ; Kitaguchi, Hitoshi ; Nishimura, T. ; Kato, Toshihiko
Author_Institution :
Supercond. Wire Unit, Nat. Inst. for Mater. Sci. (NIMS), Tsukuba, Japan
Abstract :
Critical current (Ic) and n-values were evaluated for commercially available (Bi, Pb)2Sr2Ca2Cu3O10 (Bi-2223), GdBa2Cu3O7 (GdBCO) and (RE)Ba2Cu3O7 (REBCO, RE = rare earth) superconducting tapes. The transport properties were investigated in magnetic fields up to 1 T in various temperatures around 77 K. The measurements up to the transport current of 500 A were performed in pressurized and depressurized liquid nitrogen using a newly developed apparatus. Bi-2223 showed the largest Ic for magnetic field parallel to the tape surface, whereas it showed the largest anisotropy. It was found that the in-field Ic property of GdBCO was improved. The effect of artificial pinning centers introduced for REBCO was confirmed.
Keywords :
barium compounds; bismuth compounds; calcium compounds; critical currents; gadolinium compounds; high-temperature superconductors; lead compounds; rare earth compounds; strontium compounds; superconducting tapes; (BiPb)2Sr2Ca2Cu3O10; Bi-2223 superconducting tapes; GdBCO superconducting tapes; GdBa2Cu3O7; Ic-B-T evaluation; REBCO superconducting tapes; artificial pinning centers; critical current; high-Tc superconductors; in-field Ic property; magnetic fields; n-values; pressurized-depressurized liquid nitrogen; tape surface; transport current; transport properties; High temperature superconductors; Integrated circuits; Magnetic liquids; Perpendicular magnetic anisotropy; Superconducting magnets; Temperature measurement; Critical current; high-$T_{rm c}$ superconductor; liquid nitrogen; magnetic field; temperature;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2012.2234195
