2014/04/15 by Th. S. Bauer, Th. Bauer, M. Michl +2 · 20 citations
Chemical Engineering · Materials Science · Medicine · Physics and Astronomy · #Condensed matter physics #Debye #Dielectric #Dielectric response #Internal medicine #Material Dynamics and Properties #Materials science #Medicine #Nonlinear system #Nuclear magnetic resonance #Optoelectronics #Physics #Quantum mechanics #Relaxation (psychology) #Spectroscopy and Quantum Chemical Studies #Thermodynamic properties of mixtures #cond-mat.dis-nn #cond-mat.soft
paper · pdf · doi:10.1016/j.jnoncrysol.2014.07.024
published in Journal of Non-Crystalline Solids 407, 66-71 (Elsevier BV) · 8 pages, 4 figures
arxiv created 2014/04/15 · openalex publication_date 2014/07/30 · arxiv updated 2014/12/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present nonlinear dielectric measurements of glass-forming 1-propanol, a prototypical example for the monohydroxy alcohols that are known to exhibit unusual relaxation dynamics, namely an additional Debye relaxation, slower than the structural alpha relaxation. Applying high ac fields of 468 kV/cm allows for a detailed investigation of the nonlinear properties of all three relaxation processes occurring in 1-propanol, namely the Debye, alpha, and beta relaxation. Both the field-induced variations of dielectric constant and loss are reported. Polarization saturation and the absorption of field energy govern the findings in the Debye-relaxation regime, well consistent with the suggested cluster-like nature of the relaxing entities. The behavior of the alpha relaxation is in good accord with the expectations for a heterogeneous relaxation scenario. Finally, the Johari-Goldstein beta-relaxation in 1-propanol seems to exhibit no or only weak field dependence, in agreement with recent findings for the excess wing of canonical glass formers.