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Sequentially evaporated thin film YBa2Cu3O(7-x) superconducting microwave ring resonatorThere is great interest in the application of thin film high temperature superconductors in high frequency electronic circuits. A ring resonator provides a good test vehicle for assessing the microwave losses in the superconductor and for comparing films made by different techniques. Ring resonators made of YBa2Cu3O(7-x) have been investigated on LaAlO3 substrates. The superconducting thin films were deposited by sequential electron beam evaporation of Cu, Y, and BaF2 with a post anneal. Patterning of the superconducting film was done using negative photolithography. A ring resonator was also fabricated from a thin gold film as a control. Both resonators had a gold ground plane on the backside of the substrate. The ring resonators' reflection coefficients were measured as a function of frequency from 33 to 37 GHz at temperatures ranging from 20 K to 68 K. The resonator exhibited two resonances which were at 34.5 and 35.7 GHz at 68 K. The resonant frequencies increased with decreasing temperature. The magnitude of the reflection coefficients was in the calculation of the unloaded Q-values. The performance of the evaporated and gold resonator are compared with the performance of a laser ablated YBa2Cu3O(7-x) resonator. The causes of the double resonance are discussed.
Document ID
19900015957
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Rohrer, Norman J. (Ohio State Univ. Columbus., United States)
To, Hing Y. (Ohio State Univ. Columbus., United States)
Valco, George J. (Ohio State Univ. Columbus., United States)
Bhasin, Kul B. (NASA Lewis Research Center Cleveland, OH., United States)
Chorey, Chris (Sverdrup Technology, Inc., Brook Park OH., United States)
Warner, Joseph D. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1990
Subject Category
Electronics And Electrical Engineering
Report/Patent Number
NAS 1.15:103180
E-5557
UPI307-51-00
NASA-TM-103180
Meeting Information
Meeting: Conference on the Science and Technology of Thin Film Superconductors
Location: Denver, CO
Country: United States
Start Date: April 30, 1990
End Date: May 4, 1990
Sponsors: DOE
Accession Number
90N25273
Funding Number(s)
CONTRACT_GRANT: NCC3-105
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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