The α-relaxation process in simple glass forming liquid m-toluidine. I. The temperature dependence of the dielectric response

2001 ◽  
Vol 114 (16) ◽  
pp. 7118-7123 ◽  
Author(s):  
Maria Cutroni ◽  
Andrea Mandanici ◽  
Anna Spanoudaki ◽  
Rolf Pelster
Keyword(s):  
Temperature Dependence ◽  
Relaxation Process ◽  
Dielectric Response ◽  
Glass Forming

scholarly journals The Dynamic Properties of 5Cb Filled with Aerosil Particles Investigated by Pcs

1999 ◽  
Vol 559 ◽  
Author(s):  
F.M. Aliev ◽  
M. Kreuzer ◽  
Yu.P. Panarin
Keyword(s):  
Liquid Crystal ◽  
Temperature Dependence ◽  
Relaxation Process ◽  
Nematic Liquid Crystal ◽  
Broad Spectrum ◽  
Dynamic Properties ◽  
Relaxation Times ◽  
Correlation Spectroscopy ◽  
Relaxation Processes ◽  
Optoelectronic Application

ABSTRACTNematic liquid crystal filled with Aerosil particles, a prospective composite material for optoelectronic application, has been investigated by static light scattering and Photon Correlation Spectroscopy (PCS). The Aerosil particles in filled nematic liquid crystals (FN) form a network structure with LC domains about 2500 Å in size with a random distribution of the director orientation of each domain.We found that the properties of 5CB are considerably affected by the network. The N-I phase transition in filled 5CB was found to be smeared out and depressed. PCS experiments show that two new relaxation processes appear in filled 5CB in addition to the director fluctuation process in bulk. The slow relaxation process, with a broad spectrum of relaxation times, is somewhat similar to the slow decay, which is observed in confined nematic liquid crystal.The middle frequency process was assigned to the director fluctuations in the surface layer formed at the particle-LC interface. The decay function describing this relaxation process is a stretched exponential (β ≍ 0.7). The temperature dependence of the relaxation times of the middle frequency obeys the Vogel-Rilcher law. Such a temperature dependence, accompanied by a broad spectrum of relaxation times suggests that the dynamics of the director fluctuations near the Aerosil particle-LC interface is glass-like.

Identical anomalous Raman relaxation exponent in a family of single ion magnets: towards reliable Raman relaxation determination?

2020 ◽  
Vol 49 (34) ◽  
pp. 11942-11949 ◽  
Author(s):  
Gabriela Handzlik ◽  
Michał Magott ◽  
Mirosław Arczyński ◽  
Alena M. Sheveleva ◽  
Floriana Tuna ◽  
...  
Keyword(s):  
Solid State ◽  
Temperature Dependence ◽  
Relaxation Process

The results described herein suggest that the exponent n for the temperature dependence of the Raman relaxation process in the series of solid-state diluted isostructural LnIII SIMs should be identical.

Temperature Dependence of the Dielectric Response and Critical Point Energies of Bi1.85Gd0.15Te3

2018 ◽  
Vol 18 (9) ◽  
pp. 6321-6325
Author(s):  
Hoang Tung Nguyen ◽  
Tae Jung Kim ◽  
Han Gyeol Park ◽  
Van Long Le ◽  
Jinsu Kim ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Critical Point ◽  
Dielectric Response
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