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Issue 21, 2004
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Solution deposition of ultrathin zirconia films on YBa2Cu3O7−δ by molecular layering of tetra-n-propyl zirconate

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Abstract

Ultrathin (<10 nm) zirconia films were deposited on (001) and (103) YBa2Cu3O7−δ (YBCO) films by alternating exposure of the YBCO film surfaces to methylcyclohexane solutions of ultrapure Zr(OPrn)4 and n-propanol solutions of H2O. The electrical properties of silver/zirconia/YBCO sandwiches derived from such bilayers were studied using planar tunneling spectroscopy. These studies showed that ultrathin zirconia films can serve as viable tunnel barriers below the YBCO superconducting phase transition temperature. According to atomic force microscopy and transmission electron microscopy, the zirconia films were remarkably conformal, uniform, and pinhole-free.

Graphical abstract: Solution deposition of ultrathin zirconia films on YBa2Cu3O7−δ by molecular layering of tetra-n-propyl zirconate

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Article information


Submitted
14 Jul 2004
Accepted
03 Sep 2004
First published
30 Sep 2004

J. Mater. Chem., 2004,14, 3158-3166
Article type
Paper

Solution deposition of ultrathin zirconia films on YBa2Cu3O7−δ by molecular layering of tetra-n-propyl zirconate

L. H. Greene, P. J. Hentges, W. G. Klemperer, J. Wen and G. Westwood, J. Mater. Chem., 2004, 14, 3158 DOI: 10.1039/B410762B

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