Symmetric relaxation

Symmetric Relaxation Peak Broadening in Complex Systems... 

Concluding this section, we can summarize as follows The model of symmetric relaxation peak broadening presented here is not universal. However, it was illustrated through two examples that this model can describe some... 

Analogous to the situation for YBCO-123, the diffuse streaks show a sinusoidal modulation with a period 11.5c 247- The distance d = 0.087c247 matches, well within the experimental error, the distance between the two BaO layers adjacent to a single CuO layer. We therefore suggest a symmetrical relaxation of the two BaO layers in a BaO—CuO—BaO triplet [7.51]. The occurrence of maxima of the modulations of the streaks at positions h = 0, implies that no offset in the plane exists between both BaO layers of the triplet. 

High Frequency Relaxation As illustrated in Figure 2.11, in dry annealed chitin samples, a high frequency secondary relaxation is observed, the so-called -relaxation. This relaxation is found in other polysaccharides [66] and is thought to be associated with molecular motions via the glucosidic bond [20, 61]. The fitting parameter a = 0.45 — 0.49 0.08 and the intensity of [)-relaxation have a weak dependence on temperature. = 1 values in the HN model describe a symmetric relaxation by the simple Cole-Cole model. It can be seen... 

The shape of this relaxation seems to be symmetric the HN fitting parameters [9] a = 0.72 0.08 and jS = 1.0 0.09 are temperature independent in both CS forms, in agreement with previous studies [20], A value of jS = 1 describes a symmetric relaxations that can be described by the simpler Cole-Cole model. It can be seen that the experimental data could be fitted with the Cole-Cole model involving less parameters in agreement with other authors [62, 65],... 

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