High critical current double-sided, thick-film REBa2Cu3O7−δ tapes by Advanced MOCVD

Enhancing the cost-effectiveness and performance of Rare Earth Barium Copper Oxide (REBCO) coated conductors remains a key objective for advancing applications in power transmission, fusion energy, particle accelerators, and rotating machines. One direct method to achieve this is by increasing the conductor’s critical current under operational conditions. This study introduces a major breakthrough in fabricating Zr-doped (Gd,Y) BaCuO double-sided tapes utilizing an Advanced Metal Organic Chemical Vapor Deposition (A-MOCVD) technique. A single-pass deposition resulted in uniform films of $\sim 4\mu m$ on both sides of the tape, with critical current values at 20K and 20T consistently above 950 A/4 mm, peaking at 1100 A/4 mm. Additionally, a self-field transport critical current of 930 A/4 mm was attained in self-field conditions at 77 K, 0 T, translating to a critical current density of 2.9 MA/cm ². These results represent some of the highest reported performance metrics for REBCO tapes of this thickness, underscoring the potential of double-sided A-MOCVD processing for next-generation superconducting applications.