New superconductor has record breaking current density

A new superconducting wire made from rare-earth barium copper oxide (REBCO) has achieved a record-breaking current density of 190 MA/cm² at 4.2 K, without any external magnetic field. Even at 20 K, which is relevant for commercial nuclear fusion applications, the wire maintains a current density of over 150 MA/cm². This wire, only 0.2 microns thick, outperforms traditional superconducting wires that are nearly ten times thicker. The development, led by researchers at the University at Buffalo, highlights the potential of high-temperature superconducting (HTS) wires in various applications, including energy generation, storage, and transportation. The wire's performance is attributed to advanced manufacturing techniques, specifically pulsed laser deposition, and the incorporation of rare-earth doping and nanostructures. The researchers emphasize that while this achievement is significant, further enhancements in performance and cost reduction are necessary for widespread application, particularly in commercial nuclear fusion, which could address global energy challenges. The study indicates that optimizing deposition conditions could lead to even higher critical current densities, making HTS wires more viable for large-scale applications.

- A new REBCO superconducting wire has achieved a record current density of 190 MA/cm² at 4.2 K.

- The wire remains effective at 20 K, suitable for commercial nuclear fusion applications.

- It is significantly thinner than traditional superconducting wires, offering comparable performance.

- The development utilizes advanced manufacturing techniques and materials science innovations.

- Further improvements in performance and cost are needed for broader application in energy and technology sectors.