Millimeter wave surface resistance of grain-aligned Y1Ba2Cu3O(x) bulk materialMeasurements are reported of the millimeter-wave surface resistance of grain-aligned YBa2Cu3O(x) bulk material grown by a liquid-phase process. The measurements were performed by replacing the endplate of a TE(011) cylindrical copper cavity with the superconducting sample. Surface resistance was measured for samples with surfaces oriented perpendicular and parallel to the c-axis of the grains. For the parallel configuration, the surface resistance at 77 K and 80 GHz is given. For a very well-aligned sample with a very low density of Y2BaCuO(y) precipitates, measured in the perpendicular configuration, the transition width (10-90 percent) is about 2 K and the surface resistance is derived at 88 K. The effect of microstructure on surface resistance is discussed.
Document ID
19920063329
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wosik, J. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Kranenburg, R. A. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Wolfe, J. C. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Selvamanickam, V. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Salama, K. (Houston, University TX, United States)