Analysis of Experimental Results by the Havriliak–Negami Model in Dielectric Spectroscopy

Influence of Zr dopant on polarization in rutile (In0.5Nb0.5)0.005(Ti1‐xZrx)0.995O2 ceramics

“…Figure B shows the experimental data measured at 30 K for INZT with x = 0‐0.10, fitting Equation , and normalized εʹ and εʹʹ versus f , where f r is the frequency at peak ε ʹʹ to compare and understand the effects of Zr on the dielectric relaxation of EPDD. The increase in the FWHM of normalized ε ʹʹ peaks with x indicates increasing α values and a wider τ distribution . Figure C shows the values of E a , τ p (at 30 K), T p (at 1 kHz), and α values, all of which are related to EPDD polarization, as a function of x .…”

“…The increase in the FWHM of normalized εʹʹ peaks with x indicates increasing α values and a wider τ distribution. 26,47,48 Figure 8C shows the values of E a , τ p (at 30 K), T p (at 1 kHz), and α values, all of which are related to EPDD polarization, as a function of x. These dielectric relaxation parameters consistently increased with x in the INZT ceramics.…”

Exploring the structural properties and enhancement of Opto-electrical investigations for the synthesized epoxy based polymers with local nanoscale structures

“…where I(t) is the depolarisation current, f is the frequency of Hamon (f=0.1/t), C 0 the capacitance of measuring electrodes without the sample and V the applied voltage. In order to analyse these dielectric relaxations, we used the Havriliak-Negami model to fit correctly the experimental data of the dielectric loss [43]: where, α is the shape parameter representing symmetrical distribution of relaxation time and β is the shape parameter of an asymmetric relaxation curve of ε″ versus ω peaks and τ is the relaxation time of the system.…”

О Физическом Смысле Дисперсионных Параметров Частотной Зависимости Диэлектрической Проницаемости В Модели Гавриляка--Негами

“…Величина τ , входящая в уравнение, является време-нем релаксации, усредняемым по ансамблю группы ре-лаксаторов, представляемых в исследуемом материале. Ранее в работе [10] эти результаты были представлены нами в виде частотной зависимости времени релаксации, которая получалась расчетом τ в квазидебаевском при-ближении…”