未掺杂BiFeO3和Ni掺杂BiFeO3纳米粒子的物理化学、光学、磁学和铁电性能的比较研究,Inorganic Chemistry Communications

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未掺杂BiFeO3和Ni掺杂BiFeO3纳米粒子的物理化学、光学、磁学和铁电性能的比较研究
Inorganic Chemistry Communications ( IF 4.4 ) Pub Date : 2023-10-20 , DOI: 10.1016/j.inoche.2023.111608
C. Esther Jeyanthi , J. Gajendiran , C. Karnan , N. Kanagathara , R. Siddheswaran

通过胶体凝胶合成了未掺杂的 BiFeO 和 Ni 掺杂的 BiFeO 纳米结构，然后在 500 °C 的加工温度下进行燃烧反应，以测试其多铁性能。粉末 X 射线衍射研究揭示了合成的纯 BiFeO 的菱面体钙钛矿晶体结构，而 Ni 掺杂的 BiFeO 样品显示出菱面体钙钛矿结构的形成以及含有 FeO 和 BiFeO 的异质相。 Tauc 图证实，与未掺杂 BiFeO 的 E 值 (2.02 eV) 相比，Ni 掺杂 BiFeO 的能带隙 (E) 降低了 (1.87 eV)。通过FT-IR分析测试了合成化合物的振动带，在555 cm处发现了强吸收带，该吸收带归因于Bi-O和Fe-O的振动键。在未掺杂的 BiFeO 和 Ni 掺杂的 BiFeO 的 TEM 图像中出现了具有不规则形态的聚集颗粒。合成的未掺杂和 Ni 掺杂 BiFeO 材料的铁磁和铁电行为在室温下的磁化强度与磁场 (M−H) 环路和极化电场 (PE) 中被注意到。与未掺杂的BiFeO相比，Ni掺杂的BiFeO的磁滞回线、矫顽力、磁饱和、饱和极化、剩磁和极化的面积均减小。阐明了研究的 Ni 掺杂 BiFeO 结果，以评估器件应用的软磁性质。

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A comparative study on physico-chemical, optical, magnetic and ferroelectric properties of undoped BiFeO3 and Ni-doped BiFeO3 nanoparticles

Undoped BiFeO and Ni-doped BiFeO nanostructures were synthesised via colloidal gel, followed by a combustion reaction at a processing temperature of 500 °C, for testing their multiferrioic properties. Powder X-ray diffraction studies reveal the rhombohedral perovskite crystal structure for the synthesized pure BiFeO, whereas Ni-doped BiFeO sample shows the formation of the rhombohedral perovskite structure along with the heterogeneous phase contains FeO and BiFeO. The energy band gap (E) of Ni-doped BiFeO was found to be reduced (1.87 eV) compared to the E value (2.02 eV) of undoped BiFeO as confirmed by the Tauc plot. The synthesized compounds were tested for their vibrational bands by FT-IR analysis, and strong absorption bands were found at 555 cm, which attribute the vibration bonds of Bi-O and Fe-O. The aggregated particles with irregular morphology appeared in the TEM images of the undoped BiFeO and the presence of Ni-doped incorporation of BiFeO. The ferromagnetic and ferroelectric behaviour of the synthesized undoped and Ni-doped BiFeOmaterials was noticed in the magnetization vs. magnetic field (M−H) loops and polarization–electric field (P-E) at room temperature. The areas of the hysteresis loop, coercive force, magnetic saturation, saturation polarization, remanent magnetization, and polarization of Ni-doped BiFeO were decreased compared to undoped BiFeO. The investigated Ni-doped BiFeO results were elucidated to assess the soft magnetic nature of device applications.

更新日期：2023-10-20

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