Determining the percolation threshold for (FeCoZr)x(CaF2)(100−x) nanocomposites produced by pure argon ion-beam sputtering

Abstract This study examines the frequency and temperature dependence of conductivity, phase shift angle and capacity of the (FeCoZr)x (CaF2)(100−x) nanocomposites, with the metal phase content in the range of 45 at.%   0. Activation energy of conductivity, determined from the Arrhenius plot, is about ΔE ≈ 0.061 eV. For a metallic phase content above 67 at.%, the metallic type of conductivity occurs, for which the derivative dσ/dT

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