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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)
Date Acquired
August 15, 2013
Publication Date
April 1, 1990
Subject Category
Solid-State Physics
Accession Number
92A45953
Funding Number(s)
CONTRACT_GRANT: MDA972-88-G-0002
CONTRACT_GRANT: NAG9-352
Distribution Limits
Public
Copyright
Other

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