High-current, double-sided REBCO tapes by advanced MOCVD

Abstract

Abstract An approach to fabricate double-sided, high-current RE-Ba2Cu3O7−δ (REBCO) tapes for use in ultrahigh-field superconducting magnets operating at and above 20 T is demonstrated. In this work, we modified our advanced metal organic chemical vapor deposition (A-MOCVD) reactor to deposit REBCO films on each side of a double-sided buffer substrate in a single pass. The composition, thickness, and critical current (I c) of 1 µm-thick REBCO films on each side of the double-sided tapes are compared. Double-sided REBCO tape with 2 µm-thick films on each side showed self-field critical current density (J c) over 2.6 MA cm−2 at 77 K and 0 T. 15%-Zr-added double-sided REBCO tape showed I c over 530 A/4 mm at 20 K, 20 T.