https://doi.org/10.1140/epjb/s10051-023-00639-3
Regular Article - Solid State and Materials
Magnetic, electric, and dielectric properties of ion-doped Fe
TeO
nanoparticles
1
University of Forestry, Kl. Ohridsky Blvd. 10, 1756, Sofia, Bulgaria
2
University of Architecture, Civil Engineering and Geodesy, Hristo Smirnenski Blvd. 1, 1046, Sofia, Bulgaria
3
Faculty of Physics, Sofia University “St. Kliment Ohridski”, J. Bouchier Blvd. 5, 1164, Sofia, Bulgaria
Received:
18
October
2023
Accepted:
10
December
2023
Published online:
25
December
2023
The magnetic, electric, and dielectric properties of pure and ion-doped antiferromagnetic magnetoelectric FeTeO
(FTO) nanoparticles (NPs) are investigated using a microscopic model and the Green’s function theory. The Neel temperature
decreases with decreasing NP size. Due to uncompensated spins on the surface, there appears a small ferromagnetism. By different ion doping is observed also a small ferromagnetism. The magnetic properties of FTO can be changed by different ion doping at the Te or Fe places in FTO NPs.
is enhanced by Nb or Zr doping at the Te site, whereas by Cr doping at the Fe site, it is reduced. The polarization P of a pure FTO NP is enhanced by applying an external magnetic field. P increases with increasing magnetic field which is evidence for the multiferroism of FTO. The temperature dependence of the dielectric constant
for a pure FTO NP shows at
= 180 K a small peak which disappears for high-frequency values. The real part of
increases, whereas the imaginary part decreases with increasing Zr dopants in FTO at the Te site.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.