掺杂剂
材料科学
兴奋剂
铁磁性
X射线光电子能谱
磁化
纳米材料
分析化学(期刊)
光电效应
纳米技术
凝聚态物理
核磁共振
光电子学
化学
磁场
物理
量子力学
色谱法
作者
Qi Sun,Yifei Fang,Sihui Wang,Wenjing Ma,Qi Zhang,Jian Wang,Yanjie Wang,Jihui Lang,Junkai Zhang,Yanqing Liu,Jing Yang
标识
DOI:10.1016/j.mseb.2023.116921
摘要
In this study, BiFe1−XMnXO3 (BFMXO, x = 0, 0.03, 0.05, 0.07, 0.10, and 0.15) nanoparticles were synthesized using the sol-gel technique. The XRD patterns confirm that the BFMXO nanoparticles exhibit a rhombic structure with the addition of Mn dopant, while structural distortion occurred as the doping concentration increased. In particular, Mn doping effectively induced lattice shrinkage and enhanced the lattice strain. The SEM and TEM images showed increased uniformity and grain size reduction as Mn doping concentration increased. The XPS spectra show that the conversion of Fe2+ to Fe3+ leads to the increase of oxygen vacancy concentration. Further, the M−H loops show that the saturation magnetization and residual magnetization of all Mn-doped samples were successfully improved with the gradual transformation from antiferromagnetism to ferromagnetism. Therefore, BiFe0.93Mn0.07O3 reached a maximum Ms and Mr of approximately 0.956 and 0.054 emu/g, respectively. Further, BiFe0.93Mn0.07O3 exhibited 4–5 times higher photoconductivity than the pristine sample. First-principles calculations further accounted for the improved magnetic and electrical properties of BFMXO induced by the Mn dopant. This study demonstrates an effective method for controlling the structure and characteristics of BFO-based nanomaterials for multifunctional device applications.
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