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Neutron Diffraction as a Tool to Explore the Free Energy Landscape in Orientationally Disordered Phases
Abstract The temperature dependence of structural parameters of orientational glasses of the halogenomethane family, Freon 112 (FCl2C)-(CCl2F)) and Freon 112a (F2ClC)-(CCl3)) are studied at short- (molecular) intermediate- (orientational correlations) and long-range (lattice parameters) scales by means of neutron diffraction. The two materials which are chemical isomers display strikingly different properties in their ordering patterns resulting from a shift in balance between electrostatic and excluded-volume interaction. The relevance of these findings to our understanding of glassy phenomena is discussed.
Neutron Diffraction as a Tool to Explore the Free Energy Landscape in Orientationally Disordered Phases
Abstract The temperature dependence of structural parameters of orientational glasses of the halogenomethane family, Freon 112 (FCl2C)-(CCl2F)) and Freon 112a (F2ClC)-(CCl3)) are studied at short- (molecular) intermediate- (orientational correlations) and long-range (lattice parameters) scales by means of neutron diffraction. The two materials which are chemical isomers display strikingly different properties in their ordering patterns resulting from a shift in balance between electrostatic and excluded-volume interaction. The relevance of these findings to our understanding of glassy phenomena is discussed.
Neutron Diffraction as a Tool to Explore the Free Energy Landscape in Orientationally Disordered Phases
Rovira-Esteva, Muriel (author) / Pardo, Luis C. (author) / Tamarit, Josep LL. (author) / Bermejo, F. Javier (author)
2010-01-01
15 pages
Article/Chapter (Book)
Electronic Resource
English
glass transition , orientational disorder , conformational disorder , short range order , neutron scattering , ODIC , 1,1,2,2-tetrachloro-1,2-difluoroethane , 1,1,1,2-tetrachloro-2,2-difluoroethane Physics , Condensed Matter Physics , Complexity , Geotechnical Engineering & Applied Earth Sciences , Solid State Physics , Spectroscopy and Microscopy , Planetology
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