YBCO/metallic oxide/YBCO trilayers for high-T_c superconducting SNS junctions
Xiaofan Meng; Takahashi, O.; Van Duzer, T.
Applied Superconductivity, IEEE Transactions on
Volume 5, Issue 2, Jun 1995 Page(s): 2377 - 2380
Digital Object Identifier   10.1109/77.403064
Summary:Some metallic oxides are prospective barrier materials for high-T_c superconducting SNS junctions. Among them, SrVO₃ is a metallic oxide with a bulk resistivity of 1-1000 μΩ-cm and a cubic perovskite-type crystal structure. The lattice constant of SrVO₃ is 3.84 Å which is close to that of the high-T_c superconductor YBa₂Cu₃O_7-x (YBCO, a=3.82 Å, b=3.89 Å). We report the fabrication of metallic SrVO₃ thin films and YBCO/SrVO₃/YBCO trilayers using pulsed laser ablation. The crystal structure and surface morphology of the films were studied by X-ray diffraction and AFM. The electrical properties of the films were measured by the standard four probe method. The potential application of SrVO₃ thin films for the barriers of high-T_c superconducting SNS junctions is discussed.

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