ABSTRACT
There has recently been tremendous progress in the development of high-temperature superconducting Josephson junctions and superconducting quantum interference devices (SQUIDs) fabricated from YBa2Cu3O7 (YBCO) thin films. Josephson junctions have potential applications to high-speed low-power digital logic, whereas SQUIDs are the most sensitive sensors to the magnetic field. A Josephson junction is composed of two superconductors separated by a barrier. Cooper pairs can tunnel or diffuse through the barrier and current flows through it with no voltage appearing across the junction (1, 2).
