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RESEARCH PRODUCT
β-process of supercooled o-terphenyl: a comparison of dielectrical and NMR data guided by mode-coupling theory
Wolfgang SchnaussErnst Rösslersubject
Condensed matter physicsRelaxation (NMR)Spin–lattice relaxationGeneral Physics and AstronomyThermodynamicsNuclear magnetic resonance spectroscopychemistry.chemical_compoundMolecular dynamicsCorrelation functionchemistryTerphenylProton NMRPhysical and Theoretical ChemistrySupercoolingdescription
Abstract According to predictions of mode-coupling theory of the liquid-glass transition, a Cole-Cole dynamical susceptibility is applied to the β-relaxation of supercooled o -terphenyl as studied by 2 H NMR spin-lattice relaxation and by dielectrical relaxation. A temperature-dependent amplitude (1- f ) is assumed for the β-process which yields a description of the NMR data consistent with the dielectrical data. The plateau value f separating the α- and β-processes in the two-step correlation function reveals a similar temperature dependence as compared to the Debye-Waller factor.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1990-07-01 | Chemical Physics Letters |