High-Throughput Characterization of (FexCo1-x)3O4 Thin-Film Composition Spreads

被引:9
|
作者
Piotrowiak, Tobias H. [1 ]
Wang, Xiao [1 ]
Banko, Lars [1 ]
Kumari, Swati [1 ]
Sarker, Suchismita [2 ]
Mehta, Apurva [2 ]
Ludwig, Alfred [1 ]
机构
[1] Ruhr Univ Bochum, Inst Mat, Chair Mat Discovery & Interfaces, D-44780 Bochum, Germany
[2] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA
关键词
spinels; surface microstructure; band gap; reactive cosputtering; OXYGEN EVOLUTION; MATERIALS SCIENCE; FACILE SYNTHESIS; SURFACE; NI; CO; FECO2O4; FERRITE; FE; COMBINATORIAL;
D O I
10.1021/acscombsci.0c00126
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Thin-film continuous composition spreads of Fe-Co-O were fabricated by reactive cosputtering from elemental Fe and Co targets in reactive Ar/O-2 atmosphere using deposition temperatures ranging from 300 to 700 degrees C. Fused silica and platinized Si/SiO2 strips were used as substrates. Ti and Ta were investigated as adhesion layer for Pt and the fabrication of the Fe-Co-O films. The thin-film composition spreads were characterized by high-throughput electron-dispersive X-ray spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, atomic force microscopy, scanning electron microscopy, and optical transmission spectroscopy. The Fe-content ranged from 28 to 72 at. %. The spinel phases Fe2CoO4 and FeCo2O4 could be synthesized and stabilized at all deposition temperatures with a continuous variation in spinel composition in between. The dependence of the film surface microstructure on the deposition temperature and the composition was mapped. Moreover, the band gap values, ranging from 2.41 eV for FeCo2O4 to 2.74 eV for Fe2CoO4, show a continuous variation with the composition.
引用
收藏
页码:804 / 812
页数:9
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