Magnetic interactions in the Zn-Co-O system: tuning local structure, valence and carrier type from extremely Co doped ZnO to ZnCo2O4 View Full Text


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Article Info

DATE

2015-11-18

AUTHORS

Bastian Henne, Verena Ney, Katharina Ollefs, Fabrice Wilhelm, Andrei Rogalev, Andreas Ney

ABSTRACT

We have investigated the relation between local structure, valence and carrier type with magnetism in the Zn-Co-O system. Thin films ranging from wurtzite Zn(1-x)Co(x)O (Co:ZnO) to ZnCo2O4 spinel were grown on c-sapphire substrates. On the one hand, the unprecedented doping of x = 0.6 Co in ZnO enables to study the structural and magnetic properties well-above the coalescence limit. On the other hand, the ZnCo2O4 spinel provides a p-type environment. We find a strong correlation between local structure, valence and carrier type throughout the Zn-Co-O system. In contrast to earlier publications neither 60% Co:ZnO nor ZnCo2O4 exhibit any sign of ferromagnetic order despite of the high concentration of magnetic ions and a p-type carrier background. Instead, antiferromagnetic exchange is found to be the predominant magnetic interaction in the Zn-Co-O system. More... »

PAGES

16863

References to SciGraph publications

  • 2013-11-26. Advanced Instrumentation for X-ray Magnetic Circular Dichroism in MAGNETISM AND SYNCHROTRON RADIATION: TOWARDS THE FOURTH GENERATION LIGHT SOURCES
  • 2010-11-23. A ten-year perspective on dilute magnetic semiconductors and oxides in NATURE MATERIALS
  • 2000-02. Similarity of Percolation Thresholds on the HCP and FCC Lattices in JOURNAL OF STATISTICAL PHYSICS
  • 2012-05-27. Emissive ZnO–graphene quantum dots for white-light-emitting diodes in NATURE NANOTECHNOLOGY
  • 2005-03. Preparation of ZnCo2O4 spinel whiskers from zinc cobalt oxalate in INORGANIC MATERIALS
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1038/srep16863

    DOI

    http://dx.doi.org/10.1038/srep16863

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1036738213

    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/26578268


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