YBCO Film With Sm Addition Using Low-Fluorine TFA-MOD Approach

Author

Shi, Dongqi ; Wang, Lin ; Kim, Jung Ho ; Zhu, Xuebin ; Liu, Min ; Li, Qi ; Zeng, Rong ; Ahn, Jyhuan ; Dou, S.X. ; Yoo, J. ; Kim, Y.K. ; Yamashita, T. ; Barry, John ; Taylor, Richard

Author_Institution

Inst. of Supercond. & Electron. Mater. (ISEM), Univ. of Wollongong, Wollongong, NSW, Australia

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

3208

Lastpage

3211

Abstract

Yttrium barium copper oxide (YBCO) film was synthesized by a metal-organic deposition (MOD) process with fluorine-free Y and Cu precursor. The precursor solution with Sm addition enabled further improvement of the thickness and uniformity of precursor films. The calcination and firing processes were studied, and the precursor film was successfully converted to dense and uniform YBCO film on LaAlO₃ (LAO) substrate after annealing in a wet Ar and O₂ atmosphere. The measured critical current density (J _c) value was about 80 A/cm-w (2.66 MA/cm²). The trifluoroacetate (TFA) reduced MOD process has the advantage that it has a larger tolerance for variations in the gas flow rate and path. The results on a Sm-YBCO film deposited on LAO with a CeO² buffer layer fabricated by MOD are also presented.

Keywords

annealing; barium compounds; buffer layers; calcination; critical current density (superconductivity); firing (materials); high-temperature superconductors; liquid phase deposition; samarium; superconducting thin films; yttrium compounds; LAO substrate; LaAlO₃; MOD process; Sm-YBa₂Cu₃O₇; annealing; buffer layer; calcination; critical current density; firing process; fluorine-free Cu precursor; fluorine-free Y precursor; gas flow rate; metal-organic deposition process; trifluoroacetate; yttrium barium copper oxide film synthesis; Coated conductor; MOD; YBCO film; fluorine;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2019211

Filename

5153226