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@ARTICLE{Wahyudi:282889,
author = {Wahyudi, O. and Ceretti, M. and Weill, I. and Cousson, A.
and Weill, F. and Meven, M. and Guerre, M. and Villesuzanne,
A. and Bassat, J.-M. and Paulus, W.},
title = {{G}rowth of high quality single crystals of strontium doped
({N}d,{P}r)-nickelates, {N}d $_{2−x}$ {S}r $_{x}$ {N}i{O}
$_{4+δ}$ and {P}r $_{2−x}$ {S}r $_{x}$ {N}i{O} $_{4+δ}$},
journal = {CrystEngComm},
volume = {17},
number = {33},
issn = {1466-8033},
address = {London},
publisher = {RSC},
reportid = {FZJ-2016-01634},
pages = {6278 - 6285},
year = {2015},
abstract = {Large size and high quality single crystals of
Nd2−xSrxNiO4+δ and Pr2−xSrxNiO4+δ, with selected
composition (x = 0.0, 0.1 and 0.5), were grown by a
floating-zone technique using an image furnace. We found
that even small deviations from the ideal cation
stoichiometry led to either NiO segregation or formation of
Ni-poor Pr4Ni3O10−x, or RExOy intergrowth phases,
rendering the title compounds unstable even under ambient
conditions. Related to potential applications as membranes
in SOFC, we importantly found Nd2−xSrxNiO4+δ and
Pr2−xSrxNiO4+δ powders, obtained from ground
stoichiometric single crystals, to be stable in air at high
temperature (1000 °C), contrary to the partial
decomposition observed when synthesized as polycrystalline
powders by classical solid state synthesis. The presence of
NiO/Pr4Ni3O10−x or RExOy intergrowth phases are discussed
as a drawback limiting high temperature stability for
Pr2NiO4+δ. Grown single crystals were characterised by
neutron and X-ray diffraction as well as by electron
microscopy (SEM/EDS), revealing their excellent quality in
terms of composition, homogeneity and crystallinity. For
each crystal, the oxygen content was determined by
thermogravimetric analysis in a reductive atmosphere.
Transmission electron microscopy highlighted a complex
incommensurate structure for Pr2NiO4.25 and Nd2NiO4.25 with
a 2D modulation vector related to oxygen ordering.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / JCNS-2},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-2-20110106},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6G15 - FRM II / MLZ (POF3-6G15)},
pid = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
experiment = {EXP:(DE-MLZ)HEIDI-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000359270700004},
doi = {10.1039/C5CE00906E},
url = {https://juser.fz-juelich.de/record/282889},
}