| I describe three different experiments using high transition temperature ;The second experiment is an investigation of the symmetry of the order parameter in YBCO using thin-film YBCO-Ag-PbIn SQUIDs. In these SQUIDs, the low-;Using a scanning SQUID microscope at 4.2 K, I measured the screening current J vs. magnetic field in a sample SQUID, and then checked whether the screening current reversed from J to ;The last experiment concerns the design, construction, and testing of a scanning SQUID microscope which is capable of imaging room-temperature samples in air. Using a high-T... |
