Volume: 2, 2023
2nd International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland:
ENVIRONMENT – PLANT – ANIMAL – PRODUCT
Abstract number: T064
DOI: https://doi.org/10.24326/ICDSUPL2.T064
Published online: 19 April 2023
ICDSUPL, 2, T064 (2023)
Technology and measurements of NiFe/SiO2 multilayer structures
Aleksandra Wilczyńska1*
1 Department of Electrical Devices and High Voltage Technology, Faculty of Electrical Engineering and Computer Science, Lublin University of Technology, Nadbystrzycka 38A, 20-618 Lublin, Lublin, Poland
* Corresponding author: aleksandra.wilczynska@pollub.edu.pl
Abstract
Granular nanocomposites are exceptionally interesting structures in terms of their physico-chemical and electrical properties. Thus, for many years they have been a challenge in the area of nanotechnology, because obtaining repeatable and desirable features is not easy. In this work, multilayer metal-dielectric structures were designed and obtained using the two-source magnetron sputtering method with three different measurement configurations and on different substrates. NiFe in the ratio of 81% Ni and 19% Fe was used to obtain the metallic phase, while SiO2 was sputtered as the dielectric phase. The substrates glass plates and Al2O3 were used. In order to observe the changes caused by the oxidation of metal grains, the structures produced on glass substrates were additionally annealed at 673 K for 30 minutes. Measurements of alternating current quantities such as resistance, capacitance, phase shift angle and dielectric loss tangent in the frequency range from 4 Hz to 8 MHz at room temperature out using the 4-point method were carried. On the basis of the obtained results and by means of numerical calculations, the diagram of conductivity as a function of frequency was determined, on the basis of which the occurrence of the hopping mechanism of transferring electric charges was confirmed. The diagram of the equivalent electric circuit was adapted on the basis of the diagram of the phase shift angle. The influence of the substrate and material parameters on the type of conductivity in the tested structures, as well as the influence of annealing, were also determined. The results indicate that discontinuous layers of conductive material have been developed and produced, thus it can be assumed that the obtained nanocomposites have a nanoparticulate structure.
How to cite
A. Wilczyńska, 2023. Technology and measurements of NiFe/SiO2 multilayer structures. In: 2nd International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland: Environment – Plant – Animal – Product. https://doi.org/10.24326/ICDSUPL2.T064