Electric properties of nanostructure (FeCoZr)x(CaF2)(100-x) produced in argon Ar atmosphere

Vitalii Bondariev; Karolina Czarnacka; Oleksandr Boiko

doi:10.1117/12.2205734

11 September 2015 Electric properties of nanostructure (FeCoZr)_x(CaF2)_(100-x) produced in argon Ar atmosphere

Vitalii Bondariev, Karolina Czarnacka, Oleksandr Boiko

Proceedings Volume 9662, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2015; 96624E (2015) https://doi.org/10.1117/12.2205734
Event: XXXVI Symposium on Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments (Wilga 2015), 2015, Wilga, Poland

Abstract

The paper presents frequency f and temperature T_p dependences of conductivity σ, capacitance C_p and phase shift angle θ for the nanocomposite metal-dielectric (FeCoZr)_x(CaF2)_(100-x). Samples of nanocomposite were produced by ion-beam sputtering in pure argon Ar atmosphere. Partial pressure of gas Ar in the ion source p_Ar=1.1·10^-1Pa. Contains of metallic phase in tested sample is x = 54.6 at.%. Studies carried out by stand to measuring of AC electrical properties of nanocomposites and semiconductors. The measurements have been performed using alternating current within the frequency range of 50 Hz - 1 MHz for measuring temperatures ranging from 77 K to 373 K. On the frequency-temperature dependence of phase shift angle θ at low frequencies phase shift have capacitive character and at high frequencies - inductive. Position of f_min on the frequency dependence on capacitance C_p corresponds exactly to the resonance frequency f_R for which the angle θ crosses zero. Analysis of the results showed that phenomena similar to phenomena in conventional circuit RLC occur in the nanocomposite (CoFeZr)_54.6(CaF₂)_45.4. Jumping recharging between the defects leads to the formation of dipoles and consequently to the increase of permittivity. After a time τ electron returns to the first defect and dipole disappears. The formation of inductance in nanocomposite is associated with return jumps of electrons from defect with negative charge to the defect with positive charge, set by the time, which are characterized by low values of activation energy.

Citation Download Citation

Vitalii Bondariev, Karolina Czarnacka, and Oleksandr Boiko "Electric properties of nanostructure (FeCoZr)_x(CaF2)_(100-x) produced in argon Ar atmosphere", Proc. SPIE 9662, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2015, 96624E (11 September 2015); https://doi.org/10.1117/12.2205734

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