Investigation of Superconductor Tunnel Junctions on Yttrium Barium Copper Oxide High-Temperature Superconductor

Available from UMI in association with The British Library. This thesis presents an investigation into superconducting tunnelling junctions based on high T_{ rm c} superconducting materials. Seven YBCO samples were used to make superconductor tunnel junctions. IV curves of junctions were measured at different temperatures and voltage ranges using a computer controlled measurement system. The measurements gave well behaved nonlinear IV curves as well as IV curves with very strong non-linearities. Many properties such as the 0 volt anomaly and gap anisotropy were observed.