Title :
YBCO/metallic oxide/YBCO trilayers for high-T/sub c/ superconducting SNS junctions
Author :
Xiaofan Meng ; Takahashi, O. ; Van Duzer, T.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
Some metallic oxides are prospective barrier materials for high-T/sub c/ superconducting SNS junctions. Among them, SrVO/sub 3/ is a metallic oxide with a bulk resistivity of 1-1000 /spl mu//spl Omega/-cm and a cubic perovskite-type crystal structure. The lattice constant of SrVO/sub 3/ is 3.84 /spl Aring/ which is close to that of the high-T/sub c/ superconductor YBa/sub 2/Cu/sub 3/O/sub 7-x/ (YBCO, a=3.82 /spl Aring/, b=3.89 /spl Aring/). We report the fabrication of metallic SrVO/sub 3/ thin films and YBCO/SrVO/sub 3//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 SrVO/sub 3/ thin films for the barriers of high-T/sub c/ superconducting SNS junctions is discussed.<>
Keywords :
X-ray diffraction; atomic force microscopy; barium compounds; electron device manufacture; high-temperature superconductors; lattice constants; pulsed laser deposition; strontium compounds; superconducting junction devices; surface structure; yttrium compounds; 1 to 1000 muohmcm; AFM; X-ray diffraction; YBCO/SrVO/sub 3//YBCO trilayers; YBa/sub 2/Cu/sub 3/O/sub 7/-SrVO/sub 3/-YBa/sub 2/Cu/sub 3/O/sub 7/; barrier materials; bulk resistivity; cubic perovskite-type crystal structure; electrical properties; four probe method; high-T/sub c/ superconducting SNS junctions; lattice constant; metallic SrVO/sub 3/ thin films; pulsed laser ablation; surface morphology; Conductivity; Crystalline materials; Inorganic materials; Josephson junctions; Lattices; Superconducting devices; Superconducting films; Superconducting materials; Superconducting thin films; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
