The influence of annealing atmosphere on the properties of Zn1−xCoxO powders as seen by EPR spectroscopy

The influence of annealing atmosphere on the properties of Zn1−xCoxO powders as seen by EPR spectroscopy

This paper reports the influence of the annealing in air and argon atmosphere on the structural and magnetic characteristics of Co-doped ZnO powders. XRD studies reveal a wurzite- type structure, while the formation of Co3O4 secondary phase was evidenced by Raman spectroscopy only for the sample ann...

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Hauptverfasser: Popa, A, Toloman, D, Raita, O, Stan, M, Biris, A R, Giurgiu, L M
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Annealing
Argon
Cobalt oxides
Ferromagnetism
Magnetic properties
Raman spectroscopy
Spectrum analysis
Zinc oxide
Zinc sulfide
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Zusammenfassung:This paper reports the influence of the annealing in air and argon atmosphere on the structural and magnetic characteristics of Co-doped ZnO powders. XRD studies reveal a wurzite- type structure, while the formation of Co3O4 secondary phase was evidenced by Raman spectroscopy only for the sample annealed in air. A ferromagnetic behavior was observed for the sample annealed in air atmosphere and this behavior was explained. The sample annealed in argon atmosphere presents a paramagnetic behavior.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4833737