Formation of Noncoil-Like Inductance in Nanocomposites (Fe_{0.45}Co_{0.45}Zr_{0.10})_{x}(Al_2O_3)_{1-x} Manufactured by Ion-Beam Sputtering of Complex Targets in Ar+O_2 Atmosphere

• Authors: P. Zhukowski , T. Kołtunowicz , P. Węgierek , J. Fedotova , A. Fedotov , A. Larkin
• Languages of publication: EN

Abstracts

EN

This paper investigates the inductive contribution to AC conductance in the granular nanocomposites (Fe_{0.45}Co_{0.45}Zr_{0.10})_{x}(Al_2O_3)_{1-x}. The initial nanocomposites studied were manufactured in Ar+O_2 atmosphere by ion-beam sputtering of the target containing Fe_{0.45}Co_{0.45}Zr_{0.10} and alumina stripes and then subjected to the annealing procedure in air over the temperature range 373 K < T_{a} < 873 K. These samples, before and after annealing, were studied using the temperature 77 K < T_{p} < 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, T_{p}) 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° ≤ θ_{L} < 0° are exhibited at low frequencies and the inductive properties with 0° ≤ θ_{H} < 90° become apparent at high frequencies. A value of the critical frequency f_{R}, where θ_{H} changes sign, depends on the metallic phase concentration x, measuring temperature T_{p}, and annealing temperature T_{a}.

Keywords

EN

68.55.Ln; 73.22.-f; 81.40.Ef; 84.37.+q; 72.20.Ee

Discipline

• 81.40.Ef: Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization
• 84.37.+q: Measurements in electric variables (including voltage, current, resistance, capacitance, inductance, impedance, and admittance, etc.)
• 73.22.-f: Electronic structure of nanoscale materials and related systems
• 72.20.Ee: Mobility edges; hopping transport
• 68.55.Ln: Defects and impurities: doping, implantation, distribution, concentration, etc.(for diffusion of impurities, see 66.30.J-)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2011
• Volume: 120
• Issue: 1
• Pages: 43-45

Dates

published

2011-07

Contributors

author

P. Zhukowski

• Lublin University of Technology, Nadbystrzycka 38a, 20-618 Lublin, Poland

author

T. Kołtunowicz

• Lublin University of Technology, Nadbystrzycka 38a, 20-618 Lublin, Poland

author

P. Węgierek

• Lublin University of Technology, Nadbystrzycka 38a, 20-618 Lublin, Poland

author

J. Fedotova

• National Center of Particles and High Energy Physics of BSU, Bogdanovich 153, 220040 Minsk, Belarus

author

A. Fedotov

• Belarussian State University, Independence 4, 220030 Minsk, Belarus

author

A. Larkin

• Belarussian State University, Independence 4, 220030 Minsk, Belarus

References

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Identifiers

DOI

10.12693/APhysPolA.120.43