High-frequency dynamics of type-B glass formers investigated by broadband dielectric spectroscopy

Abstract

We present the results of broadband dielectric spectroscopy on two glass formers with strong Johari-Goldstein beta-relaxations. In addition to the alpha- and beta-relaxation dynamics, the extension of the spectra up to 1 THz also allows revealing information on the fast beta-process in this class of materials. There is clear evidence for a fast process contributing in the region of the high-frequency loss minimum, which is analyzed in terms of the idealized mode-coupling theory.

arXiv comment7 pages, 5 figures

References in corpus (14)

• The Excess Wing in the Dielectric Loss of Glass-Formers: A Johari-Goldstein beta-Relaxation?
• Glassy Aging Dynamics
• Broadband Dielectric Spectroscopy on Glass-Forming Propylene Carbonate
• Minimal model for beta relaxation in viscous liquids
• Temperature development of glassy alpha-relaxation dynamics determined by broadband dielectric spectroscopy
• The excess wing in the dielectric loss of glass-forming ethanol: A relaxation process
• Nearly-logarithmic decay of correlations in glass-forming liquids
• Non-Arrhenius Behavior of Secondary Relaxation in Supercooled Liquids
• Universal and non-universal features of glassy relaxation in propylene carbonate
• Propylene Carbonate Reexamined: Mode-Coupling $\beta$ Scaling without Factorisation ?
• Glassy dynamics in mono-, di-, and tri-propylene glycol: From the alpha- to the fast beta-relaxation
• The Cole-Cole Law for Critical Dynamics in Glass-Forming Liquids
• Dielectric spectroscopy in benzophenone: The beta relaxation and its relation to the mode-coupling Cole-Cole peak
• Broadband dielectric spectroscopy and aging of glass formers

Cited by in corpus (29)

• Electrode Polarization Effects in Broadband Dielectric Spectroscopy
• Excess wing in glass-forming glycerol and LiCl-glycerol mixtures detected by neutron scattering
• Electromagnetic-radiation absorption of water
• Resolving the controversy on the glass transition temperature of water?
• Ionic conductivity of deep eutectic solvents: The role of orientational dynamics and glassy freezing
• Nonlinear dielectric response at the excess wing of glass-forming liquids
• Johari-Goldstein relaxation far below Tg: Experimental evidence for the Gardner transition in structural glasses?
• Dielectric study on mixtures of ionic liquids
• Importance of reorientational dynamics for the charge transport in ionic liquids
• Supercooled-liquid and plastic-crystalline state in succinonitrile-glutaronitrile mixtures
• Investigation of nonlinear effects in glassy matter using dielectric methods
• Supercooled water confined in a metal-organic framework
• Nonlinear dielectric response of Debye, alpha, and beta relaxation in 1-propanol
• Lithium-salt-based deep eutectic solvents: Importance of glass formation and rotation-translation coupling for the ionic charge transport
• Plastic-crystalline solid-state electrolytes: Ionic conductivity and orientational dynamics in nitrile mixtures
• Dynamics of Protein Hydration Water
• Impact of water on the charge transport of a glass-forming ionic liquid
• Effect of adding nanometre-sized heterogeneities on the structural dynamics and the excess wing of a molecular glass former
• Ionic conductivity and relaxation dynamics in plastic-crystals with nearly globular molecules
• Variation of ionic conductivity in a plastic-crystalline mixture
• A simple spin model for three steps relaxation and secondary proccesses in glass formers
• Ions in glass forming glycerol: Close correlation of alpha and fast beta relaxation
• Ionic conductivity of a lithium-doped deep eutectic solvent: Glass formation and rotation-translation coupling
• Relaxation dynamics in the one-dimensional organic charge-transfer salt δ-(EDT-TTF-CONMe${}_2$)${}_2$Br
• Johari-Goldstein relaxation in glass-electrets
• Crystal melting influenced by particle cooperativity of the liquid
• Fast dynamics in glass-forming salol investigated by dielectric spectroscopy
• Rotational dynamics, ionic conductivity, and glass formation in a ZnCl2-based deep eutectic solvent
• Exploring water's no-man's land