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Static and dynamic conductivity of amorphous nanogranulated composites
Antonets I. V.
1, Korolev R. I.1, Kotov L. N.1
1Syktyvkar State University, Syktyvkar, Russia
Email: aiv@mail.ru
The results of an experimental study of the static and dynamic conductivities of amorphous nanogranulated composites (CoFeB)x+(SiO2)1-x, 27.38≤ x≤ 84.14 at.% 493-862 nm thick, deposited on a lavsan substrate 0.02 mm thick, are presented. The spectra of the impedance modulus and phase angle in the range of 50 kHz-15 MHz are obtained. The frequency dependences of dynamic conductivity in the ranges of 50 kHz-15 MHz and 8-12 GHz, as well as the ratio of dynamic to static conductivity on the ferromagnetic alloy content at various frequencies are given. It is shown that the dynamic conductivity up to the percolation threshold can exceed the static one by more than 2-4 orders of magnitude. The influence of the structural characteristics and composition on the conductive properties of the films is determined. Keywords: composite films, impedance, reflection coefficient.
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