ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We report measurements of the millimeter wave surface resistance of grain-aligned YBa2Cu3Ox bulk material grown by a liquid phase process. The measurements were performed by replacing the endplate of a TE011 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. We show that, for the parallel configuration, the surface resistance at 77 K and 80 GHz is typically near 100 mΩ. For a very well-aligned sample with a very low density of Y2BaCuOy precipitates, measured in the perpendicular configuration, the transition width (10%–90%) is about 2 K and the surface resistance is less than 50 mΩ at 88 K. The effect of microstructure on surface resistance is discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.347326
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