Local structure and magnetism of Co3+ in wurtzite Co:ZnO

The structural and magnetic properties of 30% and 50% Co-doped ZnO have been investigated in order to determine the influence of the presence of Co3+ as a potential p-type dopant. For 30% doping, Co3+ could be stabilized in the wurtzite lattice of ZnO without phase separation by providing high oxyge...

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Bibliographic Details
Published in:Physical review. B 2017-02, Vol.95 (5), p.054406
Main Authors: Henne, Bastian, Ney, Verena, Lumetzberger, Julia, Ollefs, Katharina, Wilhelm, Fabrice, Rogalev, Andrei, Ney, Andreas
Format: Article
Language:English
Subjects:
Antiferromagnetism
Cobalt
Crystal lattices
Magnetic measurement
Magnetic properties
Magnetism
Phase separation
Wurtzite
X ray absorption
X ray spectra
Zinc oxide
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Summary:The structural and magnetic properties of 30% and 50% Co-doped ZnO have been investigated in order to determine the influence of the presence of Co3+ as a potential p-type dopant. For 30% doping, Co3+ could be stabilized in the wurtzite lattice of ZnO without phase separation by providing high oxygen partial pressures during growth. At 50% Co concentration, the crystal lattice destabilizes. X-ray absorption spectroscopy and simulations are used to substantiate the valence and local structure of Co3+. Integral and element selective magnetometry reveals uncompensated antiferromagnetism of the Co atoms irrespective of being present as Co2+ or Co3+.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.95.054406