NDLI: Nucleation Study of <formula formulatype=inline> <tex Notation=TeX>${rm YBa}_{2}{rm Cu}_{3}{rm O}_{7-delta}$</tex></formula> (YBCO) Films by Modified TFA-MOD Approach

Content Provider	IEEE Xplore Digital Library
Author	Yongli Xu Zongqi Qian Ziyang Xu Peng He Massey, M. Bhattacharya, R.
Copyright Year	2002
Abstract	In this paper we studied the nucleation process of YBCO films on lattice matched substrates through modified TFA-MOD approach. An experiment designed to investigate gas flow speed on different locations of the same sample shows that nucleation does not occur on regions with HF built up. Extending conversion time shows little or no effect in these regions in terms of nucleation. Thus, a criterion has been established for the continuous nucleation and growth with respect to full conversion and gas flow speed. On the other hand, interfacial nucleation morphology study shows that temperature has huge impact on the nucleation mode. A transition from dendrite (at low temperature) to cell (medium temperature) and to super-small cell/layered (high temperature) has been observed for YBCO films derived from modified TFA-MOD approach. By controlling the nucleation mode, high Jcs above 5 MA/cm² can be routinely grown for 0.3 mum to 0.65 mum YBCO films. Experimental results reveal that the method of thinning YBCO film down to interfacial level by chemical solution developed in this research is a very useful tool for nucleation and growth study.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	3127
Ending Page	3130
Page Count	4
File Size	506322
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
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 Superconducting transition temperature High temperature superconductors Fluid flow Superconducting films Morphology Chemicals Conductive films Pulsed laser deposition MOCVD thin films High-temperature superconductors metal organic deposition nucleation and growth
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Understanding the MOD Process Between Decomposition and YBCO Formation

Microstructure and Interface Phase Formation in ${rm YBa}_{2}{rm Cu}_{3}{rm O}_{7-delta}$ Prepared by an MOD Process

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Nucleation Study of ${rm YBa}_{2}{rm Cu}_{3}{rm O}_{7-delta}$ (YBCO) Films by Modified TFA-MOD Approach

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