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@INPROCEEDINGS{Meven:840612,
author = {Meven, Martin},
title = {{HEIDI}, instrument status and surprising phase
transitions},
reportid = {FZJ-2017-08117},
year = {2017},
abstract = {The single crystal diffractometer HEIDI is jointly operated
by RWTH Aachen, Institut für Kristallographie and the
Jülich Centre for Neutron Science (JCNS). Using the hot
source of FRM II the instrument covers a range of
wavelengths between 1.17 Å down to 0.56 Å to study
chemical and magnetic structures with high resolution (and
large Q range respectively) using unpolarized neutrons. The
talk will give an overview of the instrument including the
current status of the BMBF funded project to optimize
measurements on single crystal samples in the sub-millimeter
range and first experimental results using the high
temperature mirror furnace with gas handling option. In
addition, some very recent and surprising experimental
results concerning the temperature T and time t dependent
order-disorder of H bonds in a small molecule and the not so
obvious T dependent behaviour of incommensurate
superstructure reflections in a multiferroic compound are
presented.},
month = {Jun},
date = {2017-06-19},
organization = {3rd internal biennal science meeting
of the MLZ, Grainau (Germany), 19 Jun
2017 - 22 Jun 2017},
subtyp = {Invited},
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)},
pid = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
experiment = {EXP:(DE-MLZ)HEIDI-20140101},
typ = {PUB:(DE-HGF)31},
url = {https://juser.fz-juelich.de/record/840612},
}