DocumentCode :
34892
Title :
Enhanced Flux Pinning Properties of MOD-Processed 
Thin Films With  thin films with BaZrO<sub>3</sub> (BZO) nanoparticles, fabricated by a fluorine-reduced trifluoroacetate-metal-organic deposition process. For this study, the Ba-deficient coating solutions (Y : Ba : Cu = 1 : 1.5 : 3) with various BZO contents ranging from 0 to 15 mol% were prepared by mixing Ba-trifluoroacetate with fluorine-free Y, Cu, and Zr sources. Precursor films were deposited on SrTiO<sub>3</sub> (001) substrates by dip-coating, pyrolized in a humid oxygen atmosphere, and finally fired at a high temperature in a reduced oxygen atmosphere. Highly enhanced critical current densities (J<sub>c</sub>) in magnetic fields were achievable from all BZO-doped samples. The optimally processed YBCO film with 7.5 mol% BZO nanoparticles exhibited the J<sub>c</sub> values of 0.39 and 0.5 MA/cm<sup>2</sup> at 77 K in 1 T and at 65 K in 3 T for H//c, respectively. The BZO nanoparticles of 10-50 nm size trapped in the YBCO matrix are considered to be responsible for enhanced flux pinning in BZO-doped YBCO films.</div>
</div>
<div class='row'>
<div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Keywords : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>MOCVD; barium compounds; critical current density (superconductivity); dip coating; flux pinning; high-temperature superconductors; mixing; nanofabrication; nanoparticles; pyrolysis; superconducting thin films; yttrium compounds; BZO-doped YBCO films; Ba-deficient coating solution; Ba-trifluoroacetate; MOD-processed thin films; SrTiO<sub>3</sub>; SrTiO<sub>3</sub> (001) substrates; YBCO:BaZrO<sub>3</sub>; critical current densities; dip coating; enhanced flux pinning properties; fluorine-reduced trifluoroacetate-metal-organic deposition; humid oxygen atmosphere; magnetic fields; magnetic flux density 1 T; magnetic flux density 3 T; mixing; nanoparticles; pyrolysis; temperature 65 K; temperature 77 K; Coatings; Films; Flux pinning; Magnetic fields; Nanoparticles; Substrates; Yttrium barium copper oxide; <formula formulatype=)
$ hbox{YBa}_{2}hbox{Cu}_{3}hbox{O}_{7 - delta}$ film; $hbox{BaZrO}_{3}$ $(J_{rm c})$ $(T_{rm c})$
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2013.2244155
Filename :
6423813
Link To Document :
