Title :
10 GHz cylindrical cavity resonator for characterization of surface resistance of High Tc superconducting bulk and thin films
Author :
Kumar, M. Jaya ; Kataria, N.D. ; Srivastava, G.P.
Author_Institution :
Superconductivity Div., Nat. Phys. Lab., New Delhi, India
fDate :
11/1/1994 12:00:00 AM
Abstract :
An accurate and simple measurement system incorporating a 10 GHz TE011 cylindrical cavity resonator has been established which is capable of determining the microwave surface resistance of superconducting film and bulk materials of dimension independent of cavity diameter. The advantage of this technique over the conventional end plate substitution method are discussed. The performance of the cavity as a function of temperature and surface resistance measurements on YBCO thin films of 1.0 cm×0.5 cm dimension as well as 0.5 cm diameter bulk samples are presented. The lowest surface resistance measured using this system is 2.5 mohms at 77 K for a thin YBCO film deposited on LaAl2O3 substrate
Keywords :
barium compounds; high-temperature superconductors; superconducting cavity resonators; superconducting thin films; surface conductivity; yttrium compounds; 77 K; LaAl2O3 substrate; YBCO; YBa2Cu3O7; cavity resonator; end plate substitution method; high Tc bulk superconductor; microwave surface resistance; superconducting thin films; surface resistance; Cavity resonators; Electrical resistance measurement; Microwave measurements; Superconducting films; Superconducting materials; Superconducting thin films; Surface resistance; Tellurium; Temperature; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
