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Millimeter wave surface resistance of grain-aligned Y1Ba2Cu3O(x) bulk materialMeasurements of the millimeter wave surface resistance of grain-aligned YBa2Cu3O(x) bulk material grown by a liquid phase process are reported. 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. It is shown that, for the parallel configuration, the surface resistance at 77 K and 80 GHz is typically near 100 milliohms. 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 less than 50 milliohms at 88 K. The effect of microstructure on surface resistance is discussed.
Document ID
19910038045
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Wosik, J. (Houston Univ. TX, United States)
Kranenburg, R. A. (Houston Univ. TX, United States)
Wolfe, J. C. (Houston Univ. TX, United States)
Selvamanickam, V. (Houston Univ. TX, United States)
Salama, K. (Houston, University TX, United States)
Date Acquired
August 15, 2013
Publication Date
January 15, 1991
Publication Information
Publication: Journal of Applied Physics
Volume: 69
ISSN: 0021-8979
Subject Category
SOLID-STATE PHYSICS
Funding Number(s)
CONTRACT_GRANT: NAG9-352
CONTRACT_GRANT: MDA972-88-G-0002
Distribution Limits
Public
Copyright
Other