Solution deposition of ultrathin zirconia films on YBa2Cu 3O7-δ by molecular layering of tetra-n-propyl zirconate

Laura H. Greene; Patrick J. Hentges; Walter G. Klemperer; Jian Guo Wen; Glenn Westwood

doi:10.1039/b410762b

Solution deposition of ultrathin zirconia films on YBa₂Cu ₃O_7-δ by molecular layering of tetra-n-propyl zirconate

Laura H. Greene, Patrick J. Hentges, Walter G. Klemperer, Jian Guo Wen, Glenn Westwood

Research output: Contribution to journal › Article › peer-review

Abstract

Ultrathin (< 10 nm) zirconia films were deposited on (001) and (103) YBa₂Cu₃O_7-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.

Original language	English (US)
Pages (from-to)	3158-3166
Number of pages	9
Journal	Journal of Materials Chemistry
Volume	14
Issue number	21
DOIs	https://doi.org/10.1039/b410762b
State	Published - Nov 7 2004
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
Materials Chemistry

Online availability

10.1039/b410762b

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Cite this

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title = "Solution deposition of ultrathin zirconia films on YBa2Cu 3O7-δ by molecular layering of tetra-n-propyl zirconate",

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.",

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AU - Greene, Laura H.

AU - Hentges, Patrick J.

AU - Klemperer, Walter G.

AU - Wen, Jian Guo

AU - Westwood, Glenn

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Y1 - 2004/11/7

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AB - 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.

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