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@ARTICLE{Saha:1044855,
author = {Saha, Debasish and Parnell, Steven and Honecker, Dirk and
Shin, Eunjoo and Schwärzer, Kuno and Förster, Stephan and
Frielinghaus, Henrich},
title = {{O}riented composition fluctuation domains of a
two-dimensionally confined critical {I}sing fluid},
journal = {The journal of chemical physics},
volume = {163},
number = {5},
issn = {0021-9606},
address = {Melville, NY},
publisher = {American Institute of Physics},
reportid = {FZJ-2025-03396},
pages = {054507},
year = {2025},
abstract = {A quasi-binary two-dimensional Ising critical system with
the main components D2O and butyric acid confined by
surfactant layers has been studied. The surfactant forms
large planar layers and is the basis of the charge density
waves with wave fronts aligned with the layers. To orient
the domains in an external magnetic field, thulium ions were
added to the system (replacing sodium in the surfactant with
thulium and adding more TmCl3). The critical behavior of the
forward scattering and the correlation length were observed
to be more mean-field-like. This can be explained by the
presence of the trivalent thulium ions mediating between
water and butyric acid. The high-Q scattering could be
distinguished in the different directions and the ideal
two-dimensional critical composition fluctuation exponent
ηxy = 1/4 was observed, while the other exponent ηz =
−0.08 ± 0.06 was slightly negative due to a finite
acceptance angle and the finite magnetic field. The
orientationally averaged high-Q exponent x of this study is
well-explained by ηxy = 1/4 of the two-dimensional Ising
behavior and ηz = 0.},
cin = {JCNS-FRM-II / JCNS-4 / MLZ / JCNS-1},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-4-20201012 / I:(DE-588b)4597118-3 /
I:(DE-Juel1)JCNS-1-20110106},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
(POF4-6G4) / 632 - Materials – Quantum, Complex and
Functional Materials (POF4-632)},
pid = {G:(DE-HGF)POF4-6G4 / G:(DE-HGF)POF4-632},
experiment = {EXP:(DE-MLZ)NOSPEC-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {40757837},
UT = {WOS:001544181900002},
doi = {10.1063/5.0270667},
url = {https://juser.fz-juelich.de/record/1044855},
}