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

Volume

17

Issue

2

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

3640

Lastpage

3643

Abstract

We present a systematic study of microwave nonlinearity, undertaken on different types of superconductors (Nb, NbN, MgB₂, Y₁Ba₂Cu₃O_7-delta ), in thin film form. Experiments are performed in a dielectrically loaded cavity operating at 7 GHz. The dependence of the surface impedance Z_S 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; YBa₂Cu₃O_7-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;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2007.900044

Filename

4278034