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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Structural, magnetic, and electrical properties of spin coated ilmenite-pseudobrookite xFeTiO(3)-(1-x)Fe2O3 thin films
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Structural, magnetic, and electrical properties of spin coated ilmenite-pseudobrookite xFeTiO(3)-(1-x)Fe2O3 thin films

机译:旋涂的钛酸钛矿-Pseudobrookite Xfetio(3) - (1-x)Fe2O3薄膜的结构,磁性和电性能和电性能

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摘要

We report on the structural, magnetic, optical, and electrical properties of iron titanate thin films prepared using a spin-coating technique having nominal compositions of FeTiO3 and Fe1.4Ti0.6O3. X-ray diffraction measurements show clear evidence for the presence of both ilmenite and pseudo-brookite crystal structures, which is confirmed using Raman spectroscopy. X-ray photoemission spectroscopy studies indicate that Fe is present mainly in the 2 vertical bar valence state, with some Fe3+ present on the more heavily oxidized surface of the films. The as-prepared samples exhibit weak ferromagnetism at room temperature. While the valence state of Fe is not significantly affected by vacuum annealing, the saturation magnetization is increased dramatically, reaching nearly 220 emu mole(-1) for the Fe-rich film. The optical band gap was found to be roughly 2.0 eV for all samples, with negligible changes on vacuum annealing. Published by AIP Publishing.
机译:我们报告使用具有FetiO3和Fe1.4Ti0.6O3的标称组成的旋涂技术制备的铁钛酸盐薄膜的结构,磁,光学和电性能。 X射线衍射测量显示伊尔梅钛矿和伪布鲁克岩晶体结构的明确证据,其使用拉曼光谱确认。 X射线照相激光体光谱研究表明Fe主要以2个垂直棒状状态存在,其中一些Fe3 +存在于薄膜的更重氧化表面上。 制备的样品在室温下表现出弱铁磁性。 虽然Fe的价态不会受到真空退火的显着影响,但饱和磁化强度显着增加,达到Fe的薄膜达到近220欧摩尔(-1)。 对于所有样品,发现光带间隙大约为2.0eV,对真空退火的变化可忽略不计。 通过AIP发布发布。

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