Low temperature electrical conductance in (FeCoZr)x(PbZrTiO3)(100-x) nanocomposite films

Oleksandr Boiko

doi:10.1117/12.2249217

28 September 2016 Low temperature electrical conductance in (FeCoZr)x(PbZrTiO3)(100-x) nanocomposite films

Oleksandr Boiko

Proceedings Volume 10031, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2016; 100310I (2016) https://doi.org/10.1117/12.2249217
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2016, 2016, Wilga, Poland

Abstract

In this paper, the temperature and frequency dependences of conductivity, capacity and phase angle of two nanocomposite samples containing Fe_0.45Co_0.45Zr_0.10 – based nanoparticles embedded in a doped PbZrTiO₃ ferroelectric matrix were studied. AC measurements have been performed for the low temperatures (15 K ≤ T_P) and within frequency range 50 Hz – 1 MHz. The nanocomposites studied were deposited by ion beam sputtering with use of different synthesis atmosphere in a vacuum chamber. The samples were subdued by a 15-min annealing in air in the temperatures of T_A1 = 698 K and T_A2 = 623 K. It was found that for the nanocomposite sample produced using low oxygen content in the synthesis atmosphere (x₁ = 57.6 at.%) negative values of phase angle θ occur, which indicates capacitive type of conduction in the material. We can also notice the strong rapid frequency and temperature dependences of conductivity for this sample. It can be related with hopping carrier transport in the nanocomposite. For the nanocomposite sample with x₂ = 57.6 at.%, which was produced using high oxygen content in the synthesis atmosphere we can observe occurrence of positive values of θ for frequencies f > 5×10⁴ Hz. It can be related with the additional oxidation of Fe_0.45Co_0.45Zr_0.10 nanoparticles during the annealing process (potential barriers surround nanoparticles). The type of carrier transport in the nanocomposite samples is defined as hopping.

Citation Download Citation

Oleksandr Boiko "Low temperature electrical conductance in (FeCoZr)x(PbZrTiO3)(100-x) nanocomposite films", Proc. SPIE 10031, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2016, 100310I (28 September 2016); https://doi.org/10.1117/12.2249217

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