Enhanced electrical and magnetic properties of barium manganese titanium oxide perovskite ceramics synthesized by solid-state reaction

BaMn_0.75Ti_0.25O₃ ceramics were synthesized through a conventional solid-state reaction method, which provided a robust route for material fabrication. The structural analysis via Rietveld refinement of X-ray diffraction (XRD) patterns confirmed that the material crystallizes in a rhombohedral perovskite phase, characteristic of Mn and Ti-doped BaTiO₃. Scanning electron microscopy (SEM) images revealed a microstructure with densely packed, quasi-spherical grains, indicating a high degree of homogeneity in the ceramic's surface morphology. Energy-dispersive X-ray spectroscopy (EDS) further validated the elemental composition, confirming that the actual composition closely matches the nominal values of BaMn_0.75Ti_0.25O₃. Temperature-dependent dielectric measurements highlighted the complex polarization mechanisms in these ceramics, emphasizing both thermal effects and intrinsic material properties. The observed dielectric behavior is indicative of a mixed polarization response, likely due to the interaction between the dielectric and ferroelectric contributions in the material. Impedance and modulus spectroscopy revealed non-Debye-type relaxation behavior, which suggests the presence of multiple relaxation processes and heterogeneous conductivity pathways within the ceramics. AC conductivity studies showed that the material exhibits semiconducting behavior, with conductivity increasing with temperature. This temperature-dependent conductivity suggests a thermally activated conduction mechanism, which is often associated with charge carriers overcoming potential barriers or activating new conduction pathways. Magnetic measurements demonstrated pronounced magnetization with clear hysteresis loops, indicating robust ferromagnetic properties. The magnetic properties were observed to vary under different magnetic fields, reflecting the material's capability to maintain significant magnetization. These findings underscore the favorable dielectric and magnetic properties of BaMn_0.75Ti_0.25O₃ at room temperature. Overall, BaMn_0.75Ti_0.25O₃ ceramics exhibit promising characteristics for applications in energy storage and other advanced industrial technologies. The material’s combined dielectric and magnetic properties suggest potential utility in electronic devices, magnetic sensors, and energy storage systems. Future work will focus on further optimizing these properties and exploring the material's performance in practical applications.