Innovative Fabrication of YBCO-Based SQUID on Strontium Titanate for High-Temperature Superconductivity Applications

This study presents a cutting-edge approach for fabricating superconducting quantum interference devices (SQUIDs) using high-temperature superconductor yttrium barium copper oxide (YBCO) on strontium titanate (STO) substrates. By optimizing deposition techniques and interface engineering, we achieve robust YBCO films with enhanced critical temperatures and minimal magnetic flux trapping. The fabricated SQUIDs exhibit exceptional sensitivity and fast de-trapping of magnetic flux, enabled by the superior lattice matching and dielectric properties of the STO substrate. This method ensures high reproducibility and scalability, paving the way for advanced applications in magnetic field sensing, quantum computing, and medical imaging. Our work establishes a new benchmark for high-TC SQUID performance, unlocking transformative potential in superconducting electronics.