Kiyosumi Tsuchiya et al. from Tsukukuba compared performance of 2G conductors from Fujikura Ltd.; SuNAM Co. Ltd.; SuperOx Japan LLC; and SuperPower Inc..
Tsuchiya, K., A. Kikuchi, A. Terashima, K. Suzuki, K. Norimoto, M. Tawada, M. Masuzawa, N. Ohuchi, X. Wang, Y. Iijima, T. Takao, S. Fujita, M. Daibo, and Y. Iijima, Critical Current Characterization of Commercial REBCO Coated Conductors at 4.2 and 77 K. IEEE Transactions on Applied Superconductivity, 2017. 27(4): p. 1-5.
It was found that the high-current 4-mm-wide conductors evaluated have non-Cu Jc values of ∼1000A/mm2 at 4.2 K in an 18 T perpendicular field, and 50−60A/mm2 at 77 K in a 3 T perpendicular field. The differences in the in-field transport currents at 4.2 K among the conductors from different manufacturers investigated in this study are much larger than the differences at 77 K.