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Title: Composition dependence of dielectric properties in Se{sub 100-x}Cu{sub x} glassy alloys

In this paper we report the composition dependent of dielectric properties in Se{sub 100-x}Cu{sub x} (x = 0, 2, 4 and 6) glassy alloys. The temperature and frequency dependence of the dielectric constants and the dielectric losses in the above glassy systems in the frequency range (1k Hz-5 M Hz) and temperature range (300 K–350 K) have been measured. It has been found that dielectric constant and the dielectric loss both are highly dependent on frequency and temperature and also found to increase with increasing concentration of Cu in pure amorphous Se. The role of Cu, as an impurity in the pure a-Se glassy alloy, is also discussed in terms of electronegativity difference between the elements used in making the aforesaid glassy system. Apart from this, the results have been also correlated in terms of a dipolar model which considers the hopping of charge carriers over a potential barrier between charged defect states.
Authors:
; ;  [1]
  1. Department of Physics, Christ Church College, Kanpur-208001 (India)
Publication Date:
OSTI Identifier:
22490367
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1665; Journal Issue: 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AMORPHOUS STATE; CHARGE CARRIERS; CHEMICAL COMPOSITION; CONCENTRATION RATIO; COPPER ALLOYS; DIELECTRIC MATERIALS; ELECTRONEGATIVITY; FREQUENCY DEPENDENCE; METALLIC GLASSES; PERMITTIVITY; RELAXATION LOSSES; SELENIUM ALLOYS; TEMPERATURE DEPENDENCE