Аннотация:Bismuth ferrite nanopowders doped with holmium ions were synthesized by spray pyrolysis. By means of the TEM and SEM methods, it was established that HoxBi1-xFeO3 particles have dimensions in the range of 50–170 nm and are agglomerated into spherical formations with a size of 1.5–3 lm. A decrease in the lattice parameters and unit cell volume of holmium-doped bismuth ferrite samples was shown, and the EDX data confirm the incorporation of holmium ions into the positions of bismuth ions in the BiFeO3 lattice. Doping of bismuth ferrite with holmium ions led to a significant increase in the saturation magnetisation and residual magnetisation in comparison with undoped BiFeO3, while the coercive force decreased. Magnetic characteristics of HoxBi1-xFeO3 samples demonstrated strong dependence on temperature, and the dielectric permittivity in the frequency range up to 200 kHz remains practically unchanged. Magnetocapacitance values in fields up to 5 9 105 A/m did not exceed a tenth of a percent, which is associated with a high dispersion of nanopowders. The values of Ms and Mr obtained for HoxBi1-xFeO3 open up prospects for using this material for the development of magnetic field sensors, memory cells, and spintronic devices
