1. Thickness effect of La2Zr2O7 single buffers on metallic substrates using pulsed laser deposition for YBa2Cu3O7??-coated conductors.
- Author
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L L Ying, Y M Lu, Z Y Liu, F Fan, B Gao, C B Cai, T Thersleff, E Reich, R Huhne, and B Holzapfel
- Subjects
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LANTHANUM compounds , *BUFFER solutions , *METALLIC composites , *SUBSTRATES (Materials science) , *PULSED laser deposition , *SUPERCONDUCTORS , *BARIUM compounds , *METAL coating , *METALS , *CRYSTAL texture , *EPITAXY , *TRANSITION temperature - Abstract
In the present work, the single buffer layers of La2Zr2O7 (LZO) with different thicknesses were prepared using pulsed laser deposition (PLD) on highly textured Ni-5 at.%W tapes for YBa2Cu3O7[?]d-coated conductors. The highly textured LZO layers are obtained on the metallic substrates, making the subsequent epitaxial growth of superconducting YBa2Cu3O7[?]d layers feasible. The superconducting transition temperature increases as the LZO thickness increases up to 240 nm, achieving a value of Tc of more than 92 K with a narrow transition width less than 1 K. Inductive measurement reveals that the critical current density (Jc) reaches 0.77 MA cm[?]2 at 77 K in self-field, showing that the single buffer of LZO is comparable to standard buffer architectures such as CeO2/YSZ/Y2O3 or CeO2/LZO. This implies that the LZO as a single buffer layer is promising for the simplification of the preparation process, leading to cost-effective coated conductors. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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