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Please use this identifier to cite or link to this item: http://elib.bsu.by/handle/123456789/125472
Title: Percolation phenomena in Cux(SiOy)100-x nanocomposite films produced by ion beam-sputtering
Authors: Koltunowicz, T. N.
Zukowski, P. V.
Czarnacka, K.
Svito, I. A.
Fedotov, A. K.
Issue Date: Nov-2015
Publisher: Polish Academy of Sciences, Institute of Physics
Citation: Acta Physica Polonica A. – 2015. – Vol. 128, No 5. – P. 908 – 911
Abstract: In this paper the results of examinations of nanocomposites Cux(SiOy)100􀀀x produced by ion beam sputtering using argon ions were presented. The examinations were performed by the use of ac devices for measuring frequency in the range 50 Hz - 1 MHz and temperatures from 81 K to 273 K. The measurements were performed for the samples directly after production. Based on temperature dependences of conductivity , which were determined at the frequency 100 Hz, the Arrhenius graphs were prepared. From these graphs conductivity activation energies E were calculated. Dependences of conductivity and activation energy of electrons on the metallic phase content x at the frequency 100 Hz were determined. Analysis of the obtained dependences shows that conductivity is a parabolic function of the metallic phase content x in nanocomposites. Changes of activation energies of nanocomposites, in which metallic phase contents are in the ranges x < 12 at.% and x > 68 at.%, demonstrate negative values and metallic type of conductivity. In the range 12 at:% < x < 68 at:% activation energies have positive values and the dielectric type of conductivity. It was established that for the metallic phase content of about 68 at.% the real percolation threshold occurs, and the conduction changes from dielectric to metallic type.
URI: http://elib.bsu.by/handle/123456789/125472
Appears in Collections:Кафедра энергофизики


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