Alternating-current conductivity and dielectric relaxation of bulk iodoargentate
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 [Ag{sub 2}I{sub 4}]{sup 2−}1-D chain and [Cu(en){sub 2}]{sup 2+} cation column form the layered stacks by hydrogen bond interactions. - Abstract: An inorganic-organic hybrid compound Cu(en){sub 2}Ag{sub 2}I{sub 4} (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){sub 2}]{sup 2+} cations are separated by inorganic chain. The electrical conductivity and dielectric properties of 1 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 for 1 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.
- OSTI ID:
- 22475765
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 65; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACTIVATION ENERGY
ALTERNATING CURRENT
COPPER COMPOUNDS
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
ELECTRIC CONDUCTIVITY
ELECTROCHEMISTRY
INTERACTIONS
IODINE COMPOUNDS
MONOCRYSTALS
QUANTUM MECHANICS
RELAXATION
SILVER COMPOUNDS
SPECTROSCOPY
TEMPERATURE DEPENDENCE
THERMAL CONDUCTIVITY
TUNNEL EFFECT
X-RAY DIFFRACTION