Alternating-current conductivity and dielectric relaxation of bulk iodoargentate. (May 2015)

• Record Type: Journal Article
• Authors: Duan, Hai-Bao; Yu, Shan-Shan; Zhou, Hong
• Is Part Of: Materials research bulletin. Volume 65(2015:May)
• Page Start: 137
• Page End: 141
• Publication Date: 2015-05
• Subjects: Impedance spectroscopy -- X-ray diffraction -- Thermal conductivity -- Electrochemical properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2015.01.049
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: The electric modulus shows single dielectric relaxation process in the measured frequency range. Highlights: The conduction mechanism is described by quantum mechanical tunneling model. The applications of dielectric modulus give a simple method for evaluating the activation energy of the dielectric relaxation. The [Ag2 I4 ] 2− 1-D chain and [Cu(en)2 ] 2+ cation column form the layered stacks by hydrogen bond interactions. Abstract: An inorganic-organic hybrid compound Cu(en)2 Ag2 I4 (en = ethylenediamine) (1 ) was synthesized and single crystal structurally characterized. Along the [001] direction, the inorganic parts form an infinite 1-D chain and [Cu(en)2 ] 2+ cations are separated by inorganic chain. The electrical conductivity and dielectric properties of1 have been investigated over wide ranges of frequency. The alternating-current conductivities have been fitted to the Almond–West type power law expression with use of a single value of S. It is found that S values for1 are nearly temperature-independent, which indicates that the conduction mechanism could be quantum mechanical tunneling (QMT) model. The dielectric loss and electric modulus show single dielectric relaxation process. The activation energy obtained from temperature-dependent electric modulus compare with the calculated from the dc conductivity plots.