Formation of Noncoil-Like Inductance in Nanocomposites (Fe0.45Co0.45Zr0.10)x(Al2O3)1-x Manufactured by Ion-Beam Sputtering of Complex Targets in Ar+O2 Atmosphere

P. Zhukowskia, T.N. Kołtunowicza, P. Węgiereka, J.A. Fedotovab, A.K. Fedotovc and A.V. Larkinc aLublin University of Technology, Nadbystrzycka 38a, 20-618 Lublin, Poland bNational Center of Particles and High Energy Physics of BSU, Bogdanovich 153, 220040 Minsk, Belarus cBelarussian State University, Independence 4, 220030 Minsk, Belarus

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This paper investigates the inductive contribution to AC conductance in the granular nanocomposites (Fe0.45Co0.45Zr0.10)x(Al2O3)1-x. The initial nanocomposites studied were manufactured in Ar+O2 atmosphere by ion-beam sputtering of the target containing Fe0.45Co0.45Zr0.10 and alumina stripes and then subjected to the annealing procedure in air over the temperature range 373 K < Ta < 873 K. These samples, before and after annealing, were studied using the temperature 77 K < Tp < 300 K and frequency 50 Hz < f < 1 MHz dependences of a real part of the admittance σ(T,f). Analysis of the observed σ(f,Tp) dependences for x < 0.5 demonstrated that in the studied samples the equivalent circuits with the capacitive and noncoil-like inductive contributions can be accomplished. Just in this case, the capacitive properties of RLC, circuit with the phase angle - 90° ≤ θL < 0° are exhibited at low frequencies and the inductive properties with 0° ≤ θH < 90° become apparent at high frequencies. A value of the critical frequency fR, where θH changes sign, depends on the metallic phase concentration x, measuring temperature Tp, and annealing temperature Ta.

DOI: 10.12693/APhysPolA.120.43 PACS numbers: 68.55.Ln, 73.22.-f, 81.40.Ef, 84.37.+q, 72.20.Ee