In this report, we have investigated the structure, vibration, optical, dielectric, transport and magnetic features of the double perovskite Sr₂FeVO₆. The structural investigation of the sample is done by incorporating X-ray diffraction (XRD) and scanning electron microscopic (SEM) technique at room temperature. The structural investigation suggests the formation of a single phase polycrystalline sample having monoclinic symmetry. The chemical composition and valence of the involved elements are investigated by incorporating the X-ray photoelectron spectroscopic (XPS) technique. The dual oxidation state of Fe is revealed through the XPS investigation. The vibrational property of the sample is analyzed through both Raman and FTIR spectroscopic methods. The various modes of vibrations such as symmetric, anti-symmetric and bending modes are illustrated through Raman and FTIR techniques. Analysis of optical spectrum and energy bandgap of the sample is done by UV–Visible spectroscopic technique. The bandgap (E_g = 2.88 eV) of the material is found suitable for photocatalytic activities. The dielectric spectrum of the sample is analyzed by investigating the variation of dielectric parameters, that is ε_r and tanδ, w.r.t frequency-temperature. The dielectric spectrum is found consistent with Maxwell-Wagner model. The electrical and transport activities in the material are investigated by analyzing the spectra of impedance, modulus and AC conductivity at varying frequencies and temperatures. The relaxation feature of the material is illustrated through impedance and modulus spectroscopic techniques whereas the significant contribution of hopping conduction mechanism is depicted through AC conductivity spectra. Finally, the ferromagnetic property of the material at room temperature is clarified through the hysteresis curve.

在本报告中，我们研究了双钙钛矿 Sr ₂ FeVO ₆的结构、振动、光学、介电、传输和磁性特征。. 通过在室温下结合 X 射线衍射 (XRD) 和扫描电子显微镜 (SEM) 技术对样品进行结构研究。结构研究表明形成了具有单斜对称性的单相多晶样品。通过结合 X 射线光电子能谱 (XPS) 技术研究相关元素的化学成分和价态。通过 XPS 研究揭示了 Fe 的双重氧化态。通过拉曼和 FTIR 光谱方法分析样品的振动特性。通过拉曼和 FTIR 技术说明了各种振动模式，例如对称、反对称和弯曲模式。样品的光谱和能带隙分析是通过紫外-可见光谱技术完成的。_g  = 2.88 eV) 的材料适合光催化活性。通过考察介电参数的变化来分析样品的介电谱，即ε _r和 tanδ，wrt 频率-温度。发现介电谱与 Maxwell-Wagner 模型一致。通过分析不同频率和温度下的阻抗、模量和交流电导率的光谱，研究材料中的电和传输活动。材料的弛豫特性通过阻抗和模量光谱技术来说明，而跳跃传导机制的重要贡献则通过交流电导率谱来描述。最后，通过磁滞曲线阐明了材料在室温下的铁磁性。