| Summary: | Bi<sub>7-<i>x</i></sub>Gd<i><sub>x</sub></i>Fe<sub>3</sub>Ti<sub>3</sub>O<sub>21</sub> (<i>x</i> = (0, 0.2, 0.4, 0.6)) bismuth-layered perovskite structure compounds have been successfully prepared by a solid-state reaction. The results of X-ray studies indicate that a single-phase ceramic was obtained, characterized by an orthorhombic crystal structure for all compounds within the <i>Fm</i>2<i>m</i> space group. Microstructural analysis revealed that introducing gadolinium to the material altered the grain morphology, resulting in a more rounded grain shape and a somewhat disordered arrangement. Moreover, with higher gadolinium concentrations, there is a noticeable increase in the presence of the number of large plates. Impedance spectroscopy has been used to characterize the electrical properties of Bi<sub>7-<i>x</i></sub>Gd<i><sub>x</sub></i>Fe<sub>3</sub>Ti<sub>3</sub>O<sub>21</sub> compounds.
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