Mechanisms of electrical polarization of disordered systems based on Al-substituted LiFe-oxospinel

  • A.V. Vakalyuk Vasyl Stefanyk Precarpathian National University
  • V.M. Vakalyuk Ivano-Frankivsk National Technical University of Oil and Gas
  • M.I. Hasiuk Vasyl Stefanyk Precarpathian National University
  • I.M. Hasiuk Vasyl Stefanyk Precarpathian National University
Keywords: impedance spectroscopy, spinel, fractal-like structure, frequency dispersion of dielectric constant, dielectric susceptibility, dielectric loss angle tangent, conductivity hopping mechanism


The temperature-frequency dependences of the dielectric  permittivity and conductivity of Li2O-Fe2O3-Al2O3 ceramics in the temperature range of 298-648 K were obtained by impedance spectroscopy. Their analysis indicates the presence of a fractal-like structure in the studied samples, the effect of which is manifested at low temperatures. To study the phenomenon of electric polarization associated with this structure, we used the generalized law of Jonscher. A significant dependence of the dispersion of dielectric and conductive properties of these spinel ceramics on the temperature and aluminum content in them was revealed.


O.M. Uhorchuk, V.V. Uhorchuk, M.V. Karpets, L.S. Kaykan, B.Ja. Deputat, A.M.Boychuk, M.I. Hasyuk, Journal of Nano- & Electronic Physics 7(2), 02012 (2015).

V.O. Kotsyubinsky, V.V. Moklyak, A.B. Grubyak, P.I. Kolkovsky, A.H. Al-Saedi, Journal of Nano-and Electronic Physics 5(1), 01024 (2013).

В.K. Ostafiychuk, I.M. Gasyuk, V.V. Mоklyak, B.Y. Deputat, I.P. Yaremiy, Metal Physics and Newest Technologists 32(2), 209 (2010).

B.K. Ostafiychuk, O.V. Kopaev, I.M. Gasyuk, Functional Materials 6(4), 686 (1999).

I.M. Gasyuk, V.V. Ugorchuk, L.S. Kaykan, B.J. Deputat, Journal of Vasyl Stefanyk Precarpathian National University 1(1), 74 (2014).

B. Ostafiychuk, B. Deputat, L. Kaykan, V. Pylypiv and O. Ugorchuk, International Conference on Oxide Materials for Electronic Engineering - fabrication, properties and applications (OMEE-2014, 2014). P. 115;

I.M. Gasyuk, A.V. Vakalyuk, V.M. Vakalyuk, Materials Today: Proceedings 35(4), 567 (2021);

A.A. Volkov, G.V. Kozlov, S.P. Lebedyev, A.S. Rakitin, Solid State Physics 32(2), 329(1990).

I.I. Popov, R.R. Nigmatullin, A.A. Khamzin, and I.V. Lounev, Journal of Applied Physics 112, 094107 (2012);

B.K. Ostafiychuk, I.M. Gasyuk, L.S. Kaykan, V.V. Uhorchuk, P.P. Yakubovskiy, V.A. Tsap, Yu. S. Kaykan, Metal Physics snd Newest Technologists 36(1), 89 (2014).

M. Abdullah Dar, Khalid Mujasam Batoo, Vivek Verma, W.A. Siddiqui, R.K. Kotnala, J. Alloys and Compounds 493, 553 (2010);

How to Cite
VakalyukA., VakalyukV., HasiukM. and HasiukI. 2021. Mechanisms of electrical polarization of disordered systems based on Al-substituted LiFe-oxospinel. Physics and Chemistry of Solid State. 22, 2 (Jun. 2021), 336-340. DOI:
Scientific articles (Physics)