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Advanced Materials

Chemically Driven Nanoscopic Magnetic Phase Separation at the SrTiO3(001)/La1-xSrxCoO3 Interface

Authors

  • Maria A. Torija,

    1. Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA
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  • Manish Sharma,

    1. Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA
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  • Jaume Gazquez,

    1. GFMC, Dept. Fisica Aplicada III, Universidad Complutense de Madrid. Madrid, 28040, Spain
    2. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
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  • Maria Varela,

    1. GFMC, Dept. Fisica Aplicada III, Universidad Complutense de Madrid. Madrid, 28040, Spain
    2. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
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  • Chunyong He,

    1. Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA
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  • Josh Schmitt,

    1. Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA
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  • Julie A. Borchers,

    1. NIST Center for Neutron Research, National Institute for Standards and Technology, Gaithersburg, MD 20899, USA
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  • Mark Laver,

    1. NIST Center for Neutron Research, National Institute for Standards and Technology, Gaithersburg, MD 20899, USA
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  • Sami El-Khatib,

    1. Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA
    2. NIST Center for Neutron Research, National Institute for Standards and Technology, Gaithersburg, MD 20899, USA
    3. Department of Physics, American University of Sharjah, PO Box 26666, Sharjah, United Arab Emirates
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  • Chris Leighton

    Corresponding author
    1. Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA
    • Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA.
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Abstract

The degradation in magnetic properties in very thin film complex oxides is studied using SrTiO3(001)/La1-xSrxCoO3, providing unequivocal evidence for nanoscopic interfacial magnetic phase separation. Electron microscopy and spectroscopy reveal that this occurs due to inhomogeneity in local hole doping, driven by subtle, depthwise variations in the Sr and O stoichiometry. Simple thermodynamic and structural arguments for the origin of these variations are provided.

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