Аннотация:Ferrites BiFeO3 and PbFe2/3W1/3O3 belong to the class of multiferroics, in which ferroelectricity coexists
with magnetic ordering. Bismuth ferrite BiFeO3 is ferroelectric with Tc=1120 K and has antiferromagnetic
ordering of a cycloidal type with TN ≈ 640 K. PbFe2/3W1/3O3 is low temperature ferroelectric relaxor with
TR ≈ 150-200 K and antiferromagnetic transition at TN=365 K. Both compounds have the perovskite
crystal structure. Solid solution system of (1-x)•BiFeO3 + x•PbFe2/3W1/3O3 (0 ≤ x ≤ 1) was prepared
and studied in order to extend the range of multiferroics materials and create novel compounds with
promising properties. The samples were prepared by standard ceramic processing technology with
different concentrations x. X-ray diffraction showed that the samples were the single phases with a
perovskite structure. Information about magnetic Fe sublattice was obtained by Mössbauer effect at 57Fe
nuclei. The temperatures of the antiferromagnetic phase transition TN were determined by temperature
scaling of the intensity of the Mössbauer line at source velocity v=0. Mössbauer spectra were measured in
paramagnetic range of the samples, at room temperature and at temperature T=80K. At high temperatures
the Mössbauer spectra showed strongly broadened quadrupole doublets. In magnetic state Mössbauer
spectra had the shape of Zeeman sextets with also broadened lines. Isomer shifts and values of hyperfine
fields show that Fe atoms are in a high spin Fe3+ states according the data obtained for single phases
BiFeO3 and PbFe2/3W1/3O3 [1, 2]. The analysis of the Mössbauer spectra is considered taking into account
the nonequivalent crystallographic positions of Fe atoms due to the replacements of Fe and Bi atoms by
the atoms of W and Pb.