This title appears in the Scientific Report :
2023
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevResearch.5.023053 in citations.
Please use the identifier: http://hdl.handle.net/2128/34403 in citations.
Experimental critical dynamics of 3-methyl pyridine/D$_2$O mixtures without and with antagonistic salt
Experimental critical dynamics of 3-methyl pyridine/D$_2$O mixtures without and with antagonistic salt
We observed the criticality in the structure and dynamics of a 3d- and 2d-Ising system consisting of 3-methyl pyridine (3MP) / D2O without and with antagonistic salt. We could describe both dynamic criticalities by the Kawasaki crossover function. The dynamic critical exponent was z=0.063±0.020 and...
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Personal Name(s): | Frielinghaus, Henrich (Corresponding author) |
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Dubey, Purushottam / Wu, Baohu / Odom, Mary / Zheng, Feifei / Shin, Eunjoo / Zolnierczuk, Piotr / Holderer, Olaf / Förster, Stephan / Heiden-Hecht, Theresia | |
Contributing Institute: |
JCNS-FRM-II; JCNS-FRM-II Heinz Maier-Leibnitz Zentrum; MLZ Neutronenstreuung; JCNS-1 JCNS-4; JCNS-4 |
Published in: | Physical review research, 5 (2023) 2, S. 023053 |
Imprint: |
College Park, MD
APS
2023
|
DOI: |
10.1103/PhysRevResearch.5.023053 |
Document Type: |
Journal Article |
Research Program: |
Materials – Quantum, Complex and Functional Materials Jülich Centre for Neutron Research (JCNS) (FZJ) |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/34403 in citations.
We observed the criticality in the structure and dynamics of a 3d- and 2d-Ising system consisting of 3-methyl pyridine (3MP) / D2O without and with antagonistic salt. We could describe both dynamic criticalities by the Kawasaki crossover function. The dynamic critical exponent was z=0.063±0.020 and 0.005±0.019 for 3 and 2 dimensions, which confirms earlier observations in the 3d case and confirms expectations in the 2d case. The amplitudes of the critical dynamics are governed by the bare viscosities experimentally, and by the coefficient R theoretically (latter is proportional to (4−d)−1 with the dimensionality d). This finding is in accordance with the lubrication effect that is also connected to lamellar systems of the Brazovskii criticality . This lubrication effect is tightly connected to a laminar flow enforced by the domain structure and also holds for our 2d-Ising system. The experimental techniques employed were small angle neutron and x-rays scattering (SANS and SAXS) for the static criticality and dynamic light scattering (DLS) and neutron spin echo spectroscopy (NSE) for the critical dynamics. Furthermore, the criticality of the viscosities was measured. |