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Issue 9, 2016
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Thermodynamic stability and control of oxygen reactivity at functional oxide interfaces: EuO on ITO

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Abstract

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.

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

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Publication details

The article was received on 13 Jan 2016, accepted on 01 Feb 2016 and first published on 01 Feb 2016


Article type: Paper
DOI: 10.1039/C6TC00170J
Citation: J. Mater. Chem. C, 2016,4, 1813-1820
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    Thermodynamic stability and control of oxygen reactivity at functional oxide interfaces: EuO on ITO

    T. Gerber, P. Lömker, B. Zijlstra, C. Besson, D. N. Mueller, W. Zander, J. Schubert, M. Gorgoi and M. Müller, J. Mater. Chem. C, 2016, 4, 1813
    DOI: 10.1039/C6TC00170J

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