Characterization of Ba(1-x)K(x)BiO3 superconducting thin films for three-terminal devices

The physical parameters of a Ba(1-x)K(x)BiO3 (BKBO) superconductor have been successfully estimated by measuring the Hall effect and optical reflectivity spectra for epitaxial thin films. The results of these measurements at room temperature indicated that the optimized BKBO thin film has a carrier...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1995-04, Vol.34 (4A), p.1844-1847
Main Authors: Suzuki, Seiji, Iyori, Masahiro, Yamamoto, Tetsuya, Takahashi, Kazuhiko, Yoshisato, Yorinobu
Format: Article
Language:English
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Summary:The physical parameters of a Ba(1-x)K(x)BiO3 (BKBO) superconductor have been successfully estimated by measuring the Hall effect and optical reflectivity spectra for epitaxial thin films. The results of these measurements at room temperature indicated that the optimized BKBO thin film has a carrier density of 5.0 x 10 exp 21 /cu cm and an effective mass of 0.9 m0. Supposing the free-electron model, Fermi energy of BKBO could be estimated to be 1.2 eV. Using these parameters, the quasi-particle transmission probability was also calculated for the BKBO/Nb-doped SrTiO3 junction. (Author)
ISSN:0021-4922