Low dimensional ordering and fluctuations in methanol-β-hydroquinone-clathrate studied by X-ray and neutron diffraction
Maikel C. Rheinstädter, Mechthild Enderle, Axel Klöpperpieper, Klaus Knorr
Abstract
Methanol-β-hydroquinone-clathrate has been established as a model system for dielectric ordering and fluctuations and is conceptually close to magnetic spin systems. In X-ray and neutron diffraction experiments, we investigated the ordered structure, the one-dimensional (1D) and the three-dimensional (3D) critical scattering in the paraelectric phase, and the temperature dependence of the lattice constants. Our results can be explained by microscopic models of the methanol pseudospin in the hydroquinone cage network, in consistency with previous dielectric investigations.
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