Abstract
New data on gallium ferrite particles are reported. The results of studies of Fe3O4/GaxFe3 – xO4 and GaxFe3 – xO4/Fe3O4 (x = 0.2, 0.4, 0.6 and 0.8) nanoparticles by X-ray and neutron diffraction, small angle neutron scattering, transmission electron microscopy, magnetization measurements, and Mössbauer spectroscopy. The cubic core–shell ferrites structures were confirmed as single phases with a cell parameter of ∼8.388 Å independent of gallium content. The lack of preferences in occupancies of gallium sites was confirmed. The magnetic structure at room temperature, the stability of a disaggregated dispersion of nanoparticles in the temperature range 20–50°C, the radii of the cores, and the thickness of the coating layers, as well as the specific absorption of electromagnetic radiation rates were characterized.
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ACKNOWLEDGMENTS
We are grateful to Urszula Klekotka from Faculty of Chemistry of the University of Bialystok for sample preparation.
Funding
This work was partially supported by the National Science Centre (grant OPUS no. 2018/31/B/ST3/00279) and the Polish Government Plenipotentiary at JINR in Dubna (Project no. 04-4-1121-2015/2020), and also received financial support from the Polish Ministry of Science and Higher Education as subsidy for maintaining the research potential of the Faculty of Physics, University of Bialystok.
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Rećko, K., Satuła, D., Waliszewski, J. et al. Magnetism of Surface-Modified and Gallium-Doped Magnetite Particles. J. Surf. Investig. 14 (Suppl 1), S85–S92 (2020). https://doi.org/10.1134/S102745102007040X
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DOI: https://doi.org/10.1134/S102745102007040X