Pressure-induced change in the relaxation dynamics of glycerol |
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| Authors: | A A Pronin M V Kondrin A G Lyapin V V Brazhkin A A Volkov P Lunkenheimer and A Loidl |
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| Institution: | 1.Prokhorov General Physics Institute,Russian Academy of Sciences,Moscow,Russia;2.Institute for High-Pressure Physics,Russian Academy of Sciences,Troitsk, Moscow region,Russia;3.Experimental Physics V,University of Augsburg,Augsburg,Germany |
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| Abstract: | Glycerol is one of the best studied and most widely used glass-forming liquids; however, its dynamic properties are still
under discussion. The dielectric spectra of glycerol are studied in detail over wide ranges of temperatures and pressures
up to 4.5 GPa. Starting from the pressures of 2–3 GPa, qualitative change in the dynamics of structural relaxation processes
in glycerol has been revealed. It is accompanied by the appearance of secondary relaxation and a change in the asymptotic
behavior of the pressure dependence of the fragility. The relation between the parameters for different relaxation mechanisms
is analyzed. |
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