ABSTRACT Bismuth ferrite (BiFeO 3 , BFO) is a prominent lead‐free multiferroic material, whereas strontium titanate (SrTiO 3 , STO) is a high‐permittivity perovskite oxide widely used to tailor dielectric performance. In this work, the solid‐solution formation of (1 − x )BFO‐ x STO (0.1 ≤ x ≤ 0.4) nano‐ceramics was synthesised via a low‐temperature molten salt method using NaCl as a flux. Rietveld refinement of X‐ray diffraction patterns confirmed the formation of a single‐phase perovskite structure without secondary phases. The FESEM micrographs indicated the uniform granular‐shaped grain morphology of BFO. The XPS revealed the presence of mixed‐valence Fe ions, indicating partial reduction within the BFO lattice. The incorporation of STO suppressed oxygen vacancies, enhancing the dielectric constant (∼151 at 100 kHz for x = 0.4) and reducing the dielectric loss with increasing STO content. M‐H loops exhibited weak ferromagnetic behaviour, attributed to enhanced spin canting and lattice distortion. These results highlight the effective tuning of dielectric and magnetic properties through STO substitution, demonstrating the potential of BFO‐STO ceramics for multifunctional electronic device applications such as spintronics and dielectric storage components.
Jahangeer et al. (2026) studied this question.