https://doi.org/10.1140/epjb/s10051-023-00550-x
Regular Article - Solid State and Materials
Size and doping effects on the magnetic and electric properties of Bi
Fe
O
nanoparticles
1
University of Forestry, 1756, Sofia, Bulgaria
2
University of Architecture, Civil Engineering and Geodesy, 1046, Sofia, Bulgaria
3
Faculty of Physics, University of Sofia, 1164, Sofia, Bulgaria
Received:
23
March
2023
Accepted:
31
May
2023
Published online:
13
June
2023
In the present paper we propose a microscopic model to study the multiferroic properties of BiFeO nanoparticles. The spontaneous magnetization 
increases with decreasing nanoparticle size. is shape dependent. It is larger for cylindrical than for spherical nanoparticles. increases with increasing Co and Ho concentration, whereas by Mn doping it decreases. These tunable magnetic properties can be widely applied in spintronics. The polarization 
increases also with decreasing nanoparticle size. Mn ion doping leads to increase of , the phase transition temperature 
and the dielectric constant and so to enhanced electric and dielectric properties of BiFeO nanoparticles. Applying an external magnetic field is enhanced, which is indirect evidence for a strong magnetoelectric coupling. The specific heat 
shows an anomaly at the Neel temperature 
which vanishes by applying an external magnetic field. The band gap energy 
decreases with increasing Ti, Co and Ho dopants whereas by Mn doping increases.
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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.
