DocumentCode
1074419
Title
Key Microstructural Features of MOD YBa2Cu3O7−∂ Films on Textured Nickel Substrates
Author
Holesinger, Terry G. ; Maiorov, Boris ; Coulter, James Y. ; Civale, Leonardo ; Li, Xiaoping ; Zhang, Wei ; Huang, Yibing ; Kodenkandath, Thomas ; Rupich, Martin W.
Author_Institution
Los Alamos Nat. Lab., Los Alamos
Volume
17
Issue
2
fYear
2007
fDate
6/1/2007 12:00:00 AM
Firstpage
3259
Lastpage
3262
Abstract
Key features of the microstructure in high critical current density (JC ) MOD Y1Ba2Cu3Oy (YBCO) films on biaxially-textured nickel substrates with intervening buffer layers are presented. 0.8 mum thick MOD YBCO films on the 4cm wide RABiTS templates have 77K, self-field JC and IC values exceeding 3 MA/cm2 and 250A/cm-width, respectively. MOD YBCO films have a laminar grain structure with a high density of YBa2Cu4Oy(Y124) intergrowths, which give rise to an enhanced peak in angular anisotropy measurements of JC when the applied field is parallel to the ab planes of the YBCO films. Other key aspects of MOD YBCO films related to the laminar growth mode and layered microstructure are grain boundary overgrowth, grain boundary meandering, colony microstructures, incoherent precipitates of Y2O3 and Y2Cu2O5, and phase separations.
Keywords
MOCVD; barium compounds; buffer layers; critical current density (superconductivity); grain boundaries; high-temperature superconductors; phase separation; precipitation; superconducting thin films; yttrium compounds; MOD YBCO film; Ni surface; RABiTS template; YBa2Cu3O7; angular anisotropy measurement; biaxially-textured nickel substrate; buffer layer; colony microstructure; critical current density; grain boundary meandering; grain boundary overgrowth; high-temperature superconductor; incoherent precipitates; laminar grain structure; laminar growth mode; phase separation; size 0.8 mum; superconducting films; temperature 77 K; Buffer layers; Conductors; High temperature superconductors; Microstructure; Scanning electron microscopy; Substrates; Superconducting epitaxial layers; Superconducting films; US Department of Energy; Yttrium barium copper oxide; High-temperature superconductor; microscopy; microstructure; wires;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2007.897456
Filename
4278130
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