Title :
Microwave characteristics of bulk high-T/sub c/ superconductors
Author :
Belohoubek, E. ; Fathy, A. ; Kalokitis, D.
Author_Institution :
David Sarnoff Res. Center, Princeton, NJ, USA
Abstract :
Currently, most available high-T/sub c/ bulk material is in disk form that does not lend itself readily to microwave-loss measurements. A resonant measurement technique using low-impedance disk resonators is described. The configuration enhances the influence of conductor losses on the resonator Q and thereby permits the evaluation of disks as a function of temperature in a relatively simple test configuration with good accuracy. Measurements on bulk YBa/sub 2/Cu/sub 3/O/sub 6+x/ material are described with conductivities at X-band ranging up to 10 times that of Au at 65 degrees K.<>
Keywords :
Q-factor; Q-factor measurement; barium compounds; ceramics; high-temperature superconductors; loss measurement; microwave measurement; resonators; yttrium compounds; X-band; bulk YBa/sub 2/Cu/sub 3/O/sub 6+x/ material; bulk high-T/sub c/ superconductors; conductor losses; high temperature superconductors; low-impedance disk resonators; microwave characteristics; microwave-loss measurements; resonant measurement technique; resonator Q-factor; test configuration; Conducting materials; Conductivity; Conductors; Dielectric losses; Measurement techniques; Superconducting magnets; Superconducting materials; Superconducting microwave devices; Superconducting transition temperature; Superconductivity;
Conference_Titel :
Microwave Symposium Digest, 1988., IEEE MTT-S International
Conference_Location :
New York, NY, USA
DOI :
10.1109/MWSYM.1988.22070
