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首页> 外文期刊>X-Ray Spectrometry: An International Journal >X-ray absorption and resonant photoemission studies of electroforming process in Fe-doped SrTiO3 epitaxial films
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X-ray absorption and resonant photoemission studies of electroforming process in Fe-doped SrTiO3 epitaxial films

机译：Fe掺杂SrTiO3外延膜电成形过程的X射线吸收和共振光发射研究

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This work presents the results of the electronic structure investigations of epitaxial 2% Fe-doped SrTiO3 film. The electroforming process of the film was performed inside the ultra-high vacuum test chamber by applying positive 10V bias to the film with the use of the aluminium brush' electrode. The X-ray absorption and resonant photoemission methods were used to study the effect of Fe doping and electroformation on the electronic structure of the SrTiO3 films. Analysis of the valence band revealed the increase of the photoelectron intensity in the band gap region as the result of Fe doping. Electroformation caused a slight variation of the iron originating electronic states derived from the resonant photoemission, which can probably be related to the increasing contribution from the Fe2+ ions with respect to the Fe3+ ones. The titanium partial density of states showed an increase in the band gap region after the electroformation process. The significant decreases of the iron concentration derived from the photoemission spectra were found after electroforming procedure. The observed changes can be related to the increased migration of oxygen and possibly also iron ions provoked by a strong electric field applied by the electrode, eventually leading to modification of the local electronic structure. Copyright (c) 2015 John Wiley & Sons, Ltd.
机译：这项工作提出了外延2％Fe掺杂SrTiO3薄膜的电子结构研究的结果。薄膜的电铸过程是在超高真空测试室内通过使用铝刷电极向薄膜施加10V正偏压进行的。利用X射线吸收和共振光发射方法研究了Fe掺杂和电沉积对SrTiO3薄膜电子结构的影响。对价带的分析表明，由于Fe的掺杂，带隙区域中的光电子强度增加。电形成使源自共振光发射的源自铁的电子态发生轻微变化，这可能与Fe2 +离子相对于Fe3 +的贡献增加有关。钛的部分态密度显示出在电铸过程之后带隙区域的增加。电铸工艺后发现，由光发射光谱得出的铁浓度显着下降。观察到的变化可能与氧的迁移增加有关，也可能与电极施加的强电场激发的铁离子迁移有关，最终导致局部电子结构的改变。版权所有（c）2015 John Wiley＆Sons，Ltd.

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