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Effects of Mn doping on ferroelectric, ferromagnetic and optical properties of BiFeO3 thin films
Physica B: Condensed Matter ( IF 2.8 ) Pub Date : 2020-06-12 , DOI: 10.1016/j.physb.2020.412317
X.W. Wang , Y.F. Liang , L.Y. Sun , S.Q. Guo , K.S. Venkatesh , X.E. Wang , M.Z. Hou , S.Y. Shang , J. Shang , Y.C. Hu , S.Q. Yin

Mn-doped BiFeO3 films were prepared by chemical solution deposition method on fluorine doped tin oxide conductive glass via spin-coating technique. XRD pattern reveals the presence of the impurity phase of Bi2Fe4O9 in BiFeO3 films, while no impurity phase is found in the Mn-doped thin films. XPS spectrum demonstrates the purity of prepared thin films by exhibiting the desired elements alone and it also shows that Mn-doping restrains the change of Fe3+ valency. The leakage current result shows that Mn-doping causes the change of conduction mechanism led by the change of microstructure and the restraint of Fe ions valence. BiFe0.95Mn0.05O3 thin film has a good ferroelectric performance with high remnant polarization (Pr) value of 27 μC/cm2. Mn doped BiFeO3 films have stronger saturation magnetization than the BiFeO3 thin films. UV vis NIR transmittance spectra depicts the optical property, which shows the optical band gap decreases with the concentration of Mn increases.



中文翻译:

锰掺杂对BiFeO 3薄膜铁电,铁磁和光学性能的影响

采用旋涂技术,通过化学溶液沉积法在掺氟氧化锡导电玻璃上制备了掺锰的BiFeO 3薄膜。XRD图谱表明BiFeO 3薄膜中存在Bi 2 Fe 4 O 9杂质相,而Mn掺杂薄膜中未发现杂质相。XPS光谱通过仅显示所需元素来证明所制备薄膜的纯度,并且还表明Mn掺杂会抑制Fe 3+价态的变化。泄漏电流的结果表明,Mn的掺杂引起了微观结构的变化和Fe离子价态的约束导致的导电机理的变化。BiFe 0.95 Mn 0.05O 3薄膜具有良好的铁电性能,且剩余极化(P r)值为27μC/ cm 2。的Mn掺杂的BiFeO 3膜具有更强的饱和磁化强度比的BiFeO 3薄膜。UV vis NIR透射光谱描述了光学性质,其显示光学带隙随Mn浓度的增加而减小。

更新日期:2020-06-23
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