V. Foglietti, C.D. Del Gratta, et al.
IEEE Transactions on Magnetics
We have developed a process for the fabrication of YBaCuO high-T c junctions based on the step-edge weak-link concept. The process emphasizes the creation of sharp and straight step edges on a substrate, and the restoration of oxygen content for superconducting materials at the step edges. A diamond-like carbon film is used as an ion milling mask for the creation of steps on substrates such as LaAlO3 and SrTiO3. Room-temperature plasma oxidation is shown to be effective in restoring T c from processing related degradation for grains residing at the step edge. Using this process, dc SQUIDs were fabricated with 77 K electrical performances matching, and in certain cases exceeding, similar SQUIDs made using bicrystal-based tilt-boundary weak-link junctions.
V. Foglietti, C.D. Del Gratta, et al.
IEEE Transactions on Magnetics
C.C. Tsuei, J.R. Kirtley, et al.
Physica Scripta T
V. Foglietti, R.H. Koch, et al.
Journal of Applied Physics
J.S. Noh, C.B. Eom, et al.
physica status solidi (b)