Title :
Probing the Nonlinearities Arising in the Microwave Response of Superconductors by Intermodulation Distortion
Author :
Andreone, A. ; Cifariello, G. ; Gennaro, E. Di ; Lamura, G. ; Emery, N. ; Hérold, C. ; Marêché, J.F. ; Lagrange, P. ; Orgiani, P. ; Xi, X.X. ; Villégier, J.C.
Author_Institution :
Dept. of Phys., Univ. of Naples "Federico II", Naples
fDate :
6/1/2007 12:00:00 AM
Abstract :
We present a systematic study of microwave nonlinearity, undertaken on different types of superconductors (Nb, NbN, MgB2, Y1Ba2Cu3O7-delta ), in thin film form. Experiments are performed in a dielectrically loaded cavity operating at 7 GHz. The dependence of the surface impedance ZS and of the third order intermodulation (IMD) products on the power feeding the cavity is analysed, with the aim of shedding a light on the primary mechanisms of nonlinearity. Data from different superconductors are quantitatively compared.
Keywords :
barium compounds; high-temperature superconductors; intermodulation distortion; magnesium compounds; niobium; niobium compounds; superconducting materials; superconducting thin films; surface impedance; yttrium compounds; MgB2; Nb; NbN; YBa2Cu3O7-delta; YBa2Cu3O7; dielectrically loaded cavity; electrodynamics; frequency 7 GHz; intermodulation distortion; microwave nonlinearity; superconducting materials; surface impedance; thin film; third order intermodulation products; Dielectric thin films; Distortion measurement; Frequency; High temperature superconductors; Intermodulation distortion; Lagrangian functions; Physics; Superconducting materials; Superconductivity; Surface impedance; Electrodynamics; intermodulation distortion; microwave measurements; superconducting materials;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.900044
