Semiconductor Physics, Quantum Electronics & Optoelectronics. 2014. V. 17, N 2. P. 174-178.
https://doi.org/10.15407/spqeo17.02.174

                                                                 

Dielectric permittivity of (Ag3AsS3)x(As2S3)1-x superionic glasses and composites
I.P. Studenyak1, Yu.Yu. Neimet1, A.F. Orliukas2, A. Kezionis2, E. Kazakevicius2, T. Salkus2

1Faculty of Physics, Uzhhorod National University, 46, Pidhirna str., 88000 Uzhhorod, Ukraine
2Vilnius University, Faculty of Physics, 9, Sauletekio al., LT-10222 Vilnius, Lithuania E-mail: studenyak@dr.com

Abstract. Complex dielectric permittivity of (Ag3AsS3)x(As2S3)1-x (x = 0.3-0.9) superionic glasses and composites at 300 K were studied. A decrease of the real part of dielectric permittivity with frequency by almost five orders of magnitude as well as one dispersion region in glasses and two dispersion regions in composites, which is reflected in the dielectric loss spectra, were observed. Frequency dependences of dielectric permittivity within the range from 10 Hz to 3·109 Hz were analyzed in the framework of the Cole-Cole model. Compositional behaviour of Cole-Cole parameters in (Ag3AsS3)x(As2S3)1-x (x = 0.3-0.9) superionic glasses and composites was studied. The most substantial changes were observed with the transition from (Ag3AsS3)0.4(As2S3)0.6 glass to (Ag3AsS3)0.5(As2S3)0.5 composite and from (Ag3AsS3)0.6(As2S3)0.4 composite to (Ag3AsS3)0.8(As2S3)0.2 composite.

Keywords: superionic glasses, composites, dielectric permittivity, Cole-Cole parameters.

Manuscript received 31.01.14; revised version received 14.05.14; accepted for publication 12.06.14; published online 30.06.14.

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