ACTA

The Features of Real Part of Admittance in the Nanocomposites (Fe₄₅Co₄₅Zr₁₀)_x(Al₂O₃)_100-x Manufactured by the Ion-Beam Sputtering Technique with Ar Ions

T.N. Kołtunowicz^a, P. Zhukowski^a, V.V. Fedotova^b, A.M. Saad^c, A.V. Larkin^d and A.K. Fedotov^d
^aLublin University of Technology, Nadbystrzycka 38a, 20-618 Lublin, Poland
^bScientific-Practical Material Research Centre NAS of Belarus, P. Brovki 19, 220072 Minsk, Belarus
^cAl-Balqa Applied University, P.O. Box 2041, Amman 11953, Jordan
^dBelarussian State University, Independence 4, 220030 Minsk, Belarus

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The temperature and frequency dependences of the admittance real part σ(T,f) in granular (Fe₄₅Co₄₅Zr₁₀)_x(Al₂O₃)_100-x nanocomposite films around the percolation threshold x_C were investigated. The behaviour of σ (T, f) vs. the temperature and frequency over the ranges 77-300 K and 50 Hz-1 MHz, respectively, displays the predominance of an activation (hopping) conductance mechanism for the samples below the percolation threshold x_C and of a metallic one beyond the x_C determined as 54 ± 2 at.%. The mean hopping range d for the nanoparticles diameter D was estimated at different metallic phase content x.

DOI: 10.12693/APhysPolA.120.35
PACS numbers: 79.20.Rf, 73.22.-f, 84.37.+q, 72.20.Ee