Pressure dependence of the dielectric loss minimum slope for ten molecular liquids

Albena Ivanova Nielsen (1) , Sebatian Pawlus (2, 3) , Marian Paluch (3) , Jeppe Dyre (4)

1 NSM
2 Physics
3 Physics
4 NSM

We present a comprehensive study of data for the dielectric relaxation of ten glass-forming organic liquids at high pressure along isotherms, showing that the primary (α) high frequency relaxation is characterized well by the minimum slope and the width of the loss peak. The advantage of these two parameters is that they are model independent. For some materials with β processes in mHz and kHz range the high frequency slope tends to be −1/2 with pressure increase. Besides the two parameters captures the relaxation shape invariance at given relaxation time but different combinations of pressure and time [6].

Mots clés: Physical Sciences

Albena Ivanova Nielsen, Sebatian Pawlus, Marian Paluch, Jeppe Dyre. Pressure dependence of the dielectric loss minimum slope for ten molecular liquids. Philosophical Magazine, 2008, 88 (33-35), pp.4101-4108. ⟨10.1080/14786430802607093⟩. ⟨hal-00514001⟩