Abstract
Cathodeluminescence (CL) from high TC superconducting hulk ceramics (Y-Ba-Cu-O. Bi-Sr-Ca-Cu-O and TI-Ba-Ca-CU-O systems) and thin films (Y- and Bi-systems) has been system-atically investigated by using a modified scanning electron microscope (SEM). Characteristic CL has been successfully observed in all bulk ceramics. With particular emphasis on the TI-system. the CL results are demonstrated. The CL pattern reveals a nonuniformity. not due to the roughness of the sample surface. The CL spectrum consists of two broad bands located in the visible region. The temperature dependence of the CL spectrum has been measured. In the thin films, the luminescence is dominated by the well-known blue emission from the MgO substrate excited through the film. the analysis suggesting a feasibility of the interface characterization by CL measurements.
