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Fabrication of a new Cu-Ni bi metallic substrate and deposition of La2Zr2O7 (LZO) film on metallic substrate by chemical solution deposition process.

Abstract : Coated conductor is a stack of buffer films on a substrate and can be divided into four parts: metallic substrate, buffer layers, YBCO layer and protecting layer. Developing appropriate metallic substrate, simplifying the architecture of buffer layers and finding an economical process for the YBCO layer are the three essential areas of this field. One has developed a new bi-metallic substrate by electro-depositing a Ni layer on a textured Cu tape, and we discuss how to fabricate a textured La2Zr2O7(LZO) film on a metallic substrate by the chemical solution deposition (CSD) process. The fabrication of textured Cu tapes by a rolling-recrystallization process is discussed first, and then the electro-deposition of a Ni layer on this tape is presented. The thermal stability of texture and the magnetic property of this Cu-Ni substrate are discussed. The deposition of a textured LZO buffer layer by CSD confirms the potential interest of this substrate for coated conductors. The deposition of a LZO buffer layer, the preparation of a precursor solution and of the substrate, the epitaxial growth of LZO buffer layer are discussed in details. It is proved that a solution of acetylacetonate dissolved into propionic acid is a good precursor solution. A very thin film of S with the structure c(2×2) at the surface of the substrate is beneficial for controlling the orientation of initial LZO layer. The residual carbon issued from the synthesis of LZO is an inhibiting factor of the growth but its distribution gradient under the surface is useful. A good control of all these factors is a key for processing high quality buffers.
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https://tel.archives-ouvertes.fr/tel-00376983
Contributor : Zeming Yu <>
Submitted on : Monday, April 20, 2009 - 4:18:44 PM
Last modification on : Friday, December 18, 2020 - 1:08:04 PM
Long-term archiving on: : Thursday, June 10, 2010 - 9:08:55 PM

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  • HAL Id : tel-00376983, version 1

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CNRS | UJF | NEEL | UGA

Citation

Zeming Yu. Fabrication of a new Cu-Ni bi metallic substrate and deposition of La2Zr2O7 (LZO) film on metallic substrate by chemical solution deposition process.. Material chemistry. Université Joseph-Fourier - Grenoble I, 2008. English. ⟨tel-00376983⟩

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