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AC conductivity analysis and dielectric relaxation behavior of (C 6 H 20 N 3 )BiBr 6 .H 2 O
Author(s) -
Elfaleh Nizar,
Chouaib H.,
Kamoun S.,
Graça M. P. F.
Publication year - 2015
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/poc.3470
Subject(s) - chemistry , conductivity , arrhenius equation , dielectric spectroscopy , relaxation (psychology) , dielectric , analytical chemistry (journal) , differential scanning calorimetry , electrical resistivity and conductivity , grain boundary , activation energy , condensed matter physics , nuclear magnetic resonance , crystallography , thermodynamics , materials science , electrical engineering , microstructure , electrode , physics , psychology , social psychology , optoelectronics , chromatography , engineering , electrochemistry
The N ‐(3‐ammoniumpropyl)‐1,3 diammoniumpropane hexabromobismuthate (III) monohydrate exhibits a structural phase transition at T = 330 °K, which has been characterized by differential scanning calorimetric. The alternating current electrical conductivity and the dielectric relaxation properties of the (C 6 H 20 N 3 )BiBr 6 .H 2 O compound have been investigated by means of impedance spectroscopy measurements over a wide range of frequencies and temperatures, 100 Hz–1 MHz and 290–355 °K, respectively. The Z′ and Z″ versus frequency plots are well fitted to an equivalent circuit consisting of series of combination of grains and grain boundary elements. The frequency dependent alternating current conductivity is well described by Jonscher's universal power law: σ ( ω , T ) = σ DC ( T ) + A ( T ) ω s ( T ) . The nature of direct current conductivity variation suggests the Arrhenius type of electrical conductivity. Furthermore, the modulus plots can be characterized by full width at half height or in terms of a non‐experiential decay function φ ( t ) = exp(− t / τ ) β . The variation of the value of these elements with temperatures confirmed the result detected by differential scanning calorimetry measurements. Thus, the near values of activation energies obtained from the impedance and modulus spectra confirm that the transport is through an ion hopping mechanism. Copyright © 2015 John Wiley & Sons, Ltd.