Investigation of Electrophysical Properties, Phase Diagrams and Charge Carrier Transfer in Bi1 – xSmxFeO3

Authors

  • O.S. Pylypchuk Institute of Physics, Nat. Acad. of Sci. of Ukraine
  • V.O. Kolupaiev Institute of Physics, Nat. Acad. of Sci. of Ukraine
  • I.V. Fesych Taras Shevchenko National University of Kyiv
  • V.N. Poroshin Institute of Physics, Nat. Acad. of Sci. of Ukraine
  • A.N. Morozovska Institute of Physics, Nat. Acad. of Sci. of Ukraine

DOI:

https://doi.org/10.15407/ujpe70.10.717

Keywords:

multiferroics, nanoparticles, dielectric susceptibility, conductivity, phase diagrams

Abstract

Nanoscale multiferroics with different sizes and shape parameters are basic model objects for studying polar, antipolar, and magnetic orientation, as well as magnetoelectric interaction. Bismuth–Samarium oxide (Bi1−xSmxFeO3) is a classical orthoferrite, whose polar and magnetic properties have been sufficiently studied for the bulk and thin film samples. However, the properties of Bi1−xSmxFeO3 nanoparticles have been studied much less theoretically and experimentally, even though they can be used for the energy harvesting and storage, as well as for creating advanced FeRAM devices. In this work, we use the Ginzburg–Landau–Devonshire approach to perform phenomenological calculations of polar and dielectric properties of Bi1−xSmxFeO3 nanoparticles, and construct phase diagrams in dependence on the nanoparticle average size, and on the proportion of samarium in solid solution. Calculations of the surface adsorption/desorption influence on dielectric, polar and magnetoelectric properties at different temperatures are performed in the framework of the Stephenson–Highland approach. Experimental studies of the frequency dependence of the Bi1−xSmxFeO3 nanopowders dielectric susceptibility and conductivity are carried out. The experimental results correlate with theoretical predictions, which allows us to improve the understanding of the physical mechanisms of conductivity and charge transfer in orthoferrite nanopowders, which will further allow us to create new nanocompounds with improved and/or controllable properties, as well as expand the perspectives of their advanced applications in nanoelectronics and energy storage.

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Published

2025-10-29

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How to Cite

Investigation of Electrophysical Properties, Phase Diagrams and Charge Carrier Transfer in Bi1 – xSmxFeO3. (2025). Ukrainian Journal of Physics, 70(10), 717. https://doi.org/10.15407/ujpe70.10.717

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