« Glassy » and plastic crystals of cyanoadamantane : a Brillouin scattering investigation
Résumé
The elastic constants of cyanoadamantane have been measured in the plastic and « glassy » crystal phases. A special attention has been given to the temperature evolution of C11 as well as to the damping of the corresponding mode. Comparison with neutron results shows a strong dispersion at room temperature. The temperature dependence of C11 in the plastic phase has been explained by the setting-up of a local antiferro ordering of molecules.
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