Magnetism, spintronics

Structural features and magnetic properties of non-stoichiometric (1-$x$)BiFeO$_3$–$x$PbFeO$_3$ solid solutions

D. I. Rudskiy^a, I. A. Verbenko^a, A. O. Galatova^a, S. P. Kubrin^a, A. V. Novikovsky^a, A. V. Nazarenko^b, Yu. V. Kabirov^c, A. R. Lebedinskaya^d, A. G. Rudskaya<sup>c

a</sup> Research Institute of Physics, Southern Federal University, Rostov-on-Don
^b Southern Research Center of the Russian Academy of Sciences, Rostov-on-Don
^c Southern Federal University, Department of Physics, Rostov-on-Don
^d Academy of Architecture and Arts of the Southern Federal University, Rostov-on-Don

Abstract: The article presents the results of studying the structures and magnetic properties of the compositions of the non-stoichiometric (1-$x$)BiFeO$_3$–$x$PbFeO$_3$ solid solution system with $x$ = 0.05; 0.10; 0.15; 0.20; 0.25; 0.30; 0.50. It was found that at room temperature in the compositions $x$ = 0.05 and $x$ = 0.10 there is a rhombohedral phase R3c, in the compositions with $x$ = 0.15 – 0.30 – a cubic phase Pm-3m and in the composition with $x$ = 0.50 – a rhombohedral phase R-3c. Using the $\gamma$-resonance method, it was found that Fe$^{3+}$ ions are present in all compositions, which corresponds to non-stoichiometry in oxygen ions.

Keywords: (1-$x$)BiFeO$_3$–$x$PbFeO$_3$, solid-phase synthesis, X-ray diffraction, $\gamma$-resonance method, microstructure.

Received: 07.08.2025
Revised: 07.08.2025
Accepted: 20.10.2025

DOI: 10.61011/FTT.2025.10.61969.224-25

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