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@INPROCEEDINGS{Meven:840616,
author = {Meven, Martin and Sazonov, Andrew and Roth},
title = {{S}ingle {C}rystal {D}iffraction {S}tudies with {H}ot
{N}eutrons on {HEIDI}/{MLZ}},
reportid = {FZJ-2017-08121},
year = {2017},
abstract = {The single crystal diffractometer HEiDi at the 20 MW
neutron source Heinz Maier-Leibnitz Zentrum (MLZ) uses hot
neutrons for structural studies on various hot topics
related to physics, chemistry and mineralogy by offering
high flux, high resolution and large q range, low absorption
and high sensitivity for light elements. High temperature
studies on Nd2NiO4+δand Pr2NiO4+δ brownmillerites
concerning their oxygen diffusion pathways reveal a double
well potential pointing towards the interstitial vacancy
sites, creating a quasicontinuous shallow energy diffusion
pathway between apical and interstitial oxygen sites
(Ceretti et al.). Future studies will use a special mirror
furnace which allows temperatures > 1000°C and Atmospheres
with various oxygen content. Various multiferroic compounds
from the melilite family, e.g. Ba2CoGe2O7 andCa2CoSi2O7 were
studied in order not only to reveal their orthorhombic
antiferromagnetic magnetic order structures at low
temperature but also the risks of misinterpretation of
structural data due to multiple scattering (Sazonov et al.).
Different studies on silicateand phosphate-based gems like
brazilianite, hureaulite and axinite (G.D. Gatta et al.)
show the broad variety of hydrogen bonds with different
degrees of disorder. Aside from scientific examples this
contribution will give an overview of the most recent
instrumental features (esp. pressure cell development (BMBF
funding 05K16PA3) and the new mirror furnace).},
month = {Jul},
date = {2017-07-09},
organization = {International Conference on Neutron
Scattering 2017, Daejeon (Republik of
Korea), 9 Jul 2017 - 13 Jul 2017},
subtyp = {After Call},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / JCNS-2},
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) / 6213 - Materials and
Processes for Energy and Transport Technologies (POF3-621) /
6212 - Quantum Condensed Matter: Magnetism,
Superconductivity (POF3-621)},
pid = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15 /
G:(DE-HGF)POF3-6213 / G:(DE-HGF)POF3-6212},
experiment = {EXP:(DE-MLZ)HEIDI-20140101},
typ = {PUB:(DE-HGF)24},
url = {https://juser.fz-juelich.de/record/840616},
}