Thermodynamic stability and control of oxygen reactivity at functional oxide interfaces : EuO on ITO

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2016
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Gerber, Timm
Lömker, Patrick
Zijlstra, Bernardus
Besson, Claire
Mueller, David N.
Zander, Willi
Schubert, Jürgen
Gorgoi, Mihaela
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Journal of Materials Chemistry C. Royal Society of Chemistry. 2016, 4(9), pp. 1813-1820. ISSN 2050-7526. eISSN 2050-7534. Available under: doi: 10.1039/C6TC00170J
Zusammenfassung

As a prototypical all-oxide heterostructure, the ferromagnetic insulator europium monoxide (EuO) is synthesized on transparent and conductive indium tin oxide (ITO) virtual substrates. Non-destructive hard X-ray photoelectron spectroscopy is employed to depth profile the chemical composition of the magnetic layer and the buried oxide–oxide interface. We find that thermally activated oxygen diffusion from ITO affects the EuO growth process. We present how to control the oxygen reactivity at the interface and discuss its origin in a thermodynamic analysis. Our complementary methodical strategy allows for a significant improvement of the EuO chemical quality with sizeable magnetic properties. Generally, our approach derives guidelines for the proper choice of oxide substrates and buffer layer materials for functional all-oxide heterostructures.

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ISO 690GERBER, Timm, Patrick LÖMKER, Bernardus ZIJLSTRA, Claire BESSON, David N. MUELLER, Willi ZANDER, Jürgen SCHUBERT, Mihaela GORGOI, Martina MÜLLER, 2016. Thermodynamic stability and control of oxygen reactivity at functional oxide interfaces : EuO on ITO. In: Journal of Materials Chemistry C. Royal Society of Chemistry. 2016, 4(9), pp. 1813-1820. ISSN 2050-7526. eISSN 2050-7534. Available under: doi: 10.1039/C6TC00170J
BibTex
@article{Gerber2016Therm-49983,
  year={2016},
  doi={10.1039/C6TC00170J},
  title={Thermodynamic stability and control of oxygen reactivity at functional oxide interfaces : EuO on ITO},
  number={9},
  volume={4},
  issn={2050-7526},
  journal={Journal of Materials Chemistry C},
  pages={1813--1820},
  author={Gerber, Timm and Lömker, Patrick and Zijlstra, Bernardus and Besson, Claire and Mueller, David N. and Zander, Willi and Schubert, Jürgen and Gorgoi, Mihaela and Müller, Martina}
}
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