Tayari Faouzia, Nassar Kais Iben, Carvalho João Pedro, Teixeira Sílvia Soreto, Hammami Imen, Gavinho Sílvia Rodrigues, Graça Manuel P F, Valente Manuel Almeida
I3N-Aveiro, Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal.
TEMA-Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal.
Gels. 2025 Jun 12;11(6):450. doi: 10.3390/gels11060450.
In this study, BiBaO perovskite was successfully synthesized via the sol-gel method and thoroughly characterized to evaluate its structural, microstructural, dielectric, electrical, and magnetic properties. X-ray diffraction (XRD) confirmed the formation of a single-phase perovskite structure with high crystallinity. Scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDX) revealed a uniform grain morphology and elemental composition consistent with the intended stoichiometry. Dielectric measurements exhibited strong frequency-dependent behavior, suggesting potential for capacitive applications. The electrical conductivity displayed thermally activated behavior, indicative of semiconducting characteristics. Magnetic measurements showed weak ferromagnetic behavior at room temperature, an unusual observation for undoped BaBiO-based systems. This magnetism may stem from subtle structural distortions or compositional variations introduced during synthesis. Comparison with previously reported studies underscores the significant influence of the synthesis route and microstructural features on the multifunctional properties of BiBaO. Overall, the results highlight the promise of sol-gel-derived BiBaO as a candidate for multifunctional electronic and magnetic applications.
在本研究中，通过溶胶-凝胶法成功合成了BiBaO钙钛矿，并对其进行了全面表征，以评估其结构、微观结构、介电、电学和磁学性能。X射线衍射（XRD）证实形成了具有高结晶度的单相钙钛矿结构。扫描电子显微镜（SEM）与能量色散X射线光谱（EDX）联用显示出均匀的晶粒形态和与预期化学计量比一致的元素组成。介电测量表现出强烈的频率依赖性行为，表明其在电容应用方面具有潜力。电导率表现出热激活行为，表明具有半导体特性。磁性测量表明在室温下具有弱铁磁行为，这对于未掺杂的BaBiO基体系来说是一个不寻常的观察结果。这种磁性可能源于合成过程中引入的细微结构畸变或成分变化。与先前报道的研究相比，突出了合成路线和微观结构特征对BiBaO多功能性能的重大影响。总体而言，结果突出了溶胶-凝胶法制备的BiBaO作为多功能电子和磁性应用候选材料的前景。
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