$α$- and $β$- Relaxation Dynamics of a fragile plastic crystal

Details $α$- and $β$- Relaxation Dynamics of a fragile plastic crystal $α$- and $β$- Relaxation Dynamics of a fragile plastic crystal

2006-01-31

arxiv.org/abs/cond-mat/0601700v1

J. Chem. Phys. 124, 124911 (2006)

Physics

Condensed Matter

Disordered Systems and Neural Networks

17 pages, 6 figures

Scientific paper

10.1063/1.2180786

We present a thorough dielectric investigation of the relaxation dynamics of plastic crystalline Freon112, which exhibits freezing of the orientational degrees of freedom into a glassy crystal below 90 K. Among other plastic crystals, Freon112 stands out by being relatively fragile within Angell's classification scheme and by showing an unusually strong $\beta$-relaxation. Comparing the results to those on Freon112a, having only a single molecular conformation, points to the importance of the presence of two molecular conformations in Freon112 for the explanation of its unusual properties.

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