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@ARTICLE{DeBarros:910190,
author = {De Barros, Ruben and Ceretti, Monica and Schmidt, Wolfgang
and Pomjakushin, Vladimir Y. and Paulus, Werner},
title = {{G}rowth and {O}xygen {S}toichiometry {C}ontrol of
{H}igh-{Q}uality {L}a 2 {C}o{O} 4+δ {S}ingle {C}rystals (δ
= 0.25)},
journal = {Crystal growth $\&$ design},
volume = {22},
number = {9},
issn = {1528-7483},
address = {Washington, DC},
publisher = {ACS Publ.},
reportid = {FZJ-2022-03670},
pages = {5542 - 5551},
year = {2022},
abstract = {La2CoO4+δ is a strongly correlated oxide with exciting
physical and electronic properties originating from the
subtle interplay of the lattice, orbital, charge, and spin
degrees of freedom. In particular, oxygen-rich La2CoO4.25 is
a key compound for studying oxygen and electronic ordering
phenomena and their correlation. Single-crystal growth of
these phases has been plagued by difficulties related to
their incongruent melting. In this work, we report on the
growth and characterization of high-quality,
centimeter-sized La2CoO4.25 single crystals, suitable for
neutron scattering experiments. La2CoO4+δ single crystals
were grown by the traveling solvent floating zone without
the addition of a solvent but continuously stabilizing the
growth conditions. Postsynthesis annealing at 500 °C in
oxygen flux yielded phase-pure La2CoO4.25, which was further
characterized by single-crystal neutron and X-ray
diffraction, as well as by scanning electron microscopy with
energy-dispersive X-ray spectroscopy, revealing its quality
in terms of composition, homogeneity, and crystalline
quality. For La2CoO4.25, a complex structure with a
two-dimensional modulation vector related to oxygen ordering
was revealed by single-crystal X-ray and neutron powder
diffraction studies. In addition, magnetic measurements
coupled with preliminary single-crystal elastic neutron
scattering experiments exhibited antiferromagnetic ordering
with a Néel temperature (TN) of 36 K with a complex
magnetic structure involving the doubling of all
orthorhombic axes.},
cin = {JCNS-2 / PGI-4 / JARA-FIT / JCNS-ILL},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
$I:(DE-82)080009_20140620$ / I:(DE-Juel1)JCNS-ILL-20110128},
pnm = {632 - Materials – Quantum, Complex and Functional
Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
Research (JCNS) (FZJ) (POF4-6G4)},
pid = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
experiment = {EXP:(DE-Juel1)ILL-IN12-20150421},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000860024300001},
doi = {10.1021/acs.cgd.2c00631},
url = {https://juser.fz-juelich.de/record/910190},
}