Title :
Microwave performance of YBa/sub 2/Cu/sub 3/O/sub 7-x/ resonators coupled to single-junction SQUIDs
Author :
Hein, M.A. ; Schmoe, S. ; Strupp, M. ; Piel, H. ; Zhang, Y. ; Braginski, A.I.
Author_Institution :
Fachbereich Physik, Wuppertal Univ., Germany
fDate :
6/1/1995 12:00:00 AM
Abstract :
The effects of microwave current and dc magnetic field on quality factor and resonant frequency at 3 GHz of planar resonators, which were differently coupled to hysteretic microwave SQUIDs, are discussed. The dissipative response is analyzed in terms of a single-junction SQUID, and its coupling to a resonant tank circuit. The temperature dependences and field periodicities of all relevant parameters are discussed, and conditions for optimized operation are deduced. The results indicate potential for further improvement of the performance of microwave SQUID magnetometers.<>
Keywords :
Q-factor; SQUID magnetometers; SQUIDs; barium compounds; high-temperature superconductors; superconducting device testing; superconducting microwave devices; superconducting resonators; yttrium compounds; 3 GHz; DC magnetic field; YBa/sub 2/Cu/sub 3/O/sub 7-x/ resonators; YBa/sub 2/Cu/sub 3/O/sub 7/; dissipative response; field periodicities; hysteretic microwave SQUIDs; microwave SQUID magnetometers; microwave current; microwave performance; optimized operation; planar resonators; quality factor; resonant frequency; resonant tank circuit; single-junction SQUID coupling; temperature dependences; Coupling circuits; Frequency measurement; Hafnium; High temperature superconductors; Magnetic field measurement; Microwave measurements; Q factor; Resonance; SQUID magnetometers; Superconducting microwave devices;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
