Defects in YBCO relevant for RF superconductivity: T-, f- and H-dependencies

Author

Keskin, E. ; Numssen, K. ; Halbritter, J.

Author_Institution

Inst. fur Materialforschung I, Forschungszentrum Karlsruhe, Germany

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

2452

Lastpage

2455

Abstract

The present understanding of intrinsic and extrinsic HTS properties gained in the last years is applied to sintered and epitaxially grown YBCO. As results, the mean free path l increases rapidly below T/sub c/, whereas the weak links with critical Josephson current j/sub CJ/(T) and leakage current resistance R/sub bl/ describe R(T<0.8 T/sub c/, f, H) /spl cong/R/sub res/(T, f, H) over seven orders of magnitude in j/sub CJ/ with j/sub CJ/R/sub bl//sup 2//spl cong/10/sup -12/ A/spl Omega//sup 2/ cm/sup 2/.

Keywords

Josephson effect; barium compounds; critical currents; crystal defects; high-frequency effects; high-temperature superconductors; leakage currents; yttrium compounds; RF superconductivity; YBaCuO; critical Josephson current; defects; extrinsic HTS properties; frequency dependence; intrinsic HTS properties; leakage current resistance; magnetic field dependence; mean free path; sintered epitaxially grown samples; temperature dependence; weak links; Crystalline materials; Granular superconductors; Josephson junctions; Leakage current; Niobium; Oxidation; Radio frequency; Superconducting materials; Superconductivity; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.784971

Filename

784971