The experimental information on critical currents and epitaxial thin films of high temperature superconductors is summarized. Experiments carried out to measure critical currents across single grain boundaries are described. A variety of mechanisms responsible for limiting currents in films as well as across grain boundaries are presented and their predictions compared with experimental data.
Document ID: 19900018507. Accession ID: 90N27823. NASA, Goddard Space Flight Center, AMSAHTS 1990: Advances in Materials Science and Applications of High Temperature Superconductors; p 48.