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@ARTICLE{Bretos:203498,
author = {Bretos, Iñigo and Schneller, Theodor and Falter, Martina
and Bäcker, Michael and Hollmann, Eugen and Wördenweber,
Roger and Molina-Luna, Leopoldo and Van Tendeloo, Gustaaf
and Eibl, Oliver},
title = {{S}olution-derived {YB}a $_{2}$ {C}u $_{3}$ {O} $_{7−δ}$
({YBCO}) superconducting films with {B}a{Z}r{O} $_{3}$
({BZO}) nanodots based on reverse micelle stabilized
nanoparticles},
journal = {Journal of materials chemistry / C},
volume = {3},
number = {16},
issn = {2050-7534},
address = {London {[u.a.]},
publisher = {RSC},
reportid = {FZJ-2015-05419},
pages = {3971 - 3979},
year = {2015},
abstract = {Superconducting YBa2Cu3O7-delta (YBCO) films with
artificial BaZrO3 (BZO) nanodots were prepared using a
chemical solution deposition method involving hybrid
solutions composed of trifluoroacetate-based YBCO precursors
and reverse micelle stabilized BZO nanoparticle dispersions.
Microemulsion-mediated synthesis was used to obtain
nano-sized (similar to 12 nm) and mono-dispersed BZO
nanoparticles that preserve their features once introduced
into the YBCO solution, as revealed by dynamic light
scattering. Phase pure, epitaxial YBCO films with randomly
oriented BZO nanodots distributed over their whole
microstructure were grown from the hybrid solutions on (100)
LaAlO3 substrates. The morphology of the YBCO-BZO
nanocomposite films was strongly influenced by the amount of
nanoparticles incorporated into the system, with contents
ranging from 5 to 40 $mol\%.$ Scanning electron microscopy
showed a high density of isolated second-phase defects
consisting of BZO nanodots in the nanocomposite film with 10
$mol\%$ of BZO. Furthermore, a direct observation and
quantitative analysis of lattice defects in the form of
interfacial edge dislocations directly induced by the BZO
nanodots was evidenced by transmission electron microscopy.
The superconducting properties (77 K) of the YBCO films
improved considerably by the presence of such nanodots,
which seem to enhance the morphology of the sample and
therefore the intergranular critical properties. The
incorporation of preformed second-phase defects (here, BZO)
during the growth of the superconducting phase is the main
innovation of this novel approach for the all-solution based
low-cost fabrication of long-length coated conductors.},
cin = {PGI-8 / ICS-8 / JARA-FIT},
ddc = {540},
cid = {I:(DE-Juel1)PGI-8-20110106 / I:(DE-Juel1)ICS-8-20110106 /
$I:(DE-82)080009_20140620$},
pnm = {523 - Controlling Configuration-Based Phenomena (POF3-523)},
pid = {G:(DE-HGF)POF3-523},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000352870400018},
doi = {10.1039/C4TC02543A},
url = {https://juser.fz-juelich.de/record/203498},
}