NDLI: Fabrication of High-Quality Epitaxial YBCO Films Prepared by Fluorine-Free MOD

Content Provider	IEEE Xplore Digital Library
Author	Jung-Woo Lee Yun-Sik Joo Seung-Hyun Moon Sang-Im Yoo
Copyright Year	2002
Abstract	High-quality epitaxial YBa₂Cu₃O_7-δ (YBCO) films were successfully fabricated on LaAlO₃ (LAO) (001) substrates by fluorine-free metal-organic deposition (MOD). YBCO powder was dissolved into a fluorine-free source to prepare the coating solution. The solution was dip-coated on LAO, dried at 80°C for 10 min, pyrolized at the temperature up to 400°C in humid O₂ atmosphere, subsequently fired to produce YBCO in an oxygen partial pressure of 300 ppm, and finally oxygenated in a pure O₂ atmosphere at 450°C for 1 h. While, in addition to a-axis oriented grains, the formation of randomly oriented polycrystalline grains was unavoidable when as-pyrolized films were simply fired at 825°C for 2 h, high-quality epitaxial YBCO films with only a small amount of a-axis oriented grains were obtainable when as-pyrolized films were heated up to 850°C at first and then cooled down to 825°C and held for 2 h at the firing stage. Although our best YBCO film had a Tc,zero value of 87.5 K and Jc value of 0.47 MA/cm² at 77 K in a self-field at the present stage, this fluorine-free MOD is a promising alternative to conventional TFA-MOD since further improvement in Jc is possible through the processing optimization.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2767
Ending Page	2770
Page Count	4
File Size	866192
File Format	PDF
ISSN	10518223
Volume Number	21
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Yttrium barium copper oxide Conductors Epitaxial growth Substrates Fabrication Furnaces Powders YBCO film Critical current density fluorine-free MOD metal-organic deposition (MOD)
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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