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Proceedings Paper

New family of copper-oxide-based isotropic metallic oxides for normal metal barriers in SNS junctions
Author(s): Chang-Beom Eom
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Paper Abstract

Thin films and heterostructures of a new family of copper- oxide-based isotropic metallic oxides such as La6.4Sr1.6Cu8O20, La5BaCu6O13 and La6BaYCu8O20 have been investigated. These metallic oxides are oxygen deficient pseudo-cubic perovskites that exhibits Pauli paramagnetism, which could be ideal normal metals for SNS junctions in high Tc superconducting devices. We have grown epitaxial thin films of these metallic oxides and SNS superconducting heterostructures in situ by 90 degrees off-axis sputtering. X-ray diffraction and cross-sectional transmission electron microscopy reveal these heterostructures to have high crystalline quality and clean interfaces. This material will facilitate fabrication of ideal SNS Josephson junctions with low boundary resistance due to its excellent chemical compatibility and lattice match with cuprate superconductors and will be useful for determining the source of interface resistance in such heterostructures.

Paper Details

Date Published: 5 July 1996
PDF: 9 pages
Proc. SPIE 2697, Oxide Superconductor Physics and Nano-Engineering II, (5 July 1996); doi: 10.1117/12.250237
Show Author Affiliations
Chang-Beom Eom, Duke Univ. (United States)

Published in SPIE Proceedings Vol. 2697:
Oxide Superconductor Physics and Nano-Engineering II
Ivan Bozovic; Davor Pavuna, Editor(s)

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