Polycrystalline SmMn₂O₅has been synthesized by using sol-gel auto combustion tecnique. X-ray diffraction (XRD) pattern reflects the single phase formation of orthorhombic structure with Pbam space group. In the frequency range of (30–1000 cm⁻¹) reflectivity spectrum reveals the 14 infrared active phonons out of 36, which are already pridicted theoretically. We have estimated the optical energy band gap (E _g ) ≃ 1.5 eV from UV–visible absorption spectrum. Temperature dependent (293-533 K) DC electrical characterization up to 40 V suggests semiconducting nature of the material. The temperature dependent impedance spectroscopy within a broader frequency range of (20 Hz—3 GHz) shows decreasing behavior of dielectric constant and tangent loss while AC conductivity increasing with the rise in frequency and temperature suggest the strong frequency dispersion and relaxational behavior of the material. The activation energy calculation from AC conductivity is in good agreement with semiconducting material energy band gap.

采用溶胶-凝胶自燃技术合成了多晶SmMn ₂ O ₅。X 射线衍射 (XRD) 图案反映了具有Pbam空间群的正交结构的单相形成。在 (30–1000 cm ^-1 )的频率范围内，反射率光谱揭示了 36 个红外活性声子中的 14 个，这些声子已经在理论上进行了预测。我们已经估计了光能带隙（E _g ) ≃ 1.5 eV 从紫外可见吸收光谱。高达 40 V 的温度相关 (293-533 K) 直流电特性表明材料具有半导体性质。在更宽的频率范围 (20 Hz-3 GHz) 内，温度相关阻抗谱显示介电常数和切线损耗的降低行为，而交流电导率随频率和温度的升高而增加，表明材料具有强烈的频率色散和弛豫行为。AC电导率的活化能计算与半导体材料的能带隙非常吻合。