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Determination of surface resistance and magnetic penetration depth of superconducting YBa2Cu3O(7-delta) thin films by microwave power transmission measurementsA novel waveguide power transmission measurement technique was developed to extract the complex conductivity of superconducting thin films at microwave frequencies. The microwave conductivity was taken of two laser ablated YBa2Cu3O(7-delta) thin films on LaAlO3 with transition temperatures of approximately 86.3 and 82 K, respectively, in the temperature range 25 to 300 K. From the conductivity values, the penetration depth was found to be approximately 0.54 and 0.43 micron, and the surface resistance (R sub s) to be approximately 24 and 36 micro-Ohms at 36 GHz and 76 K for the two films under consideration. The R sub s values were compared with those obtained from the change in the Q-factor of a 36 GHz Te sub 011-mode (OFHC) copper cavity by replacing one of its end walls with the superconducting sample. This technique allows noninvasive characterization of high transition superconducting thin films at microwave frequencies.
Document ID
19910051437
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bhasin, K. B.
(NASA Lewis Research Center Cleveland, OH, United States)
Warner, J. D.
(NASA Lewis Research Center Cleveland, OH, United States)
Miranda, F. A.
(NASA Lewis Research Center Cleveland, OH, United States)
Gordon, W. L.
(Case Western Reserve University Cleveland, OH, United States)
Newman, H. S.
(U.S. Navy, Naval Research Laboratory, Washington DC, United States)
Date Acquired
August 15, 2013
Publication Date
March 1, 1991
Publication Information
Publication: IEEE Transactions on Magnetics
Volume: 27
ISSN: 0018-9464
Subject Category
Electronics And Electrical Engineering
Accession Number
91A36060
Distribution Limits
Public
Copyright
Other

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