Central European Journal of Physics

, 9:1446

Co doped ZnO semiconductor materials: structural, morphological and magnetic properties

  • Adriana Popa
  • Dana Toloman
  • Oana Raita
  • Alexandru Radu Biris
  • Gheorghe Borodi
  • Thikra Mustafa
  • Fumiya Watanabe
  • Alexandru Sorin Biris
  • Alexandru Darabont
  • Liviu Mihail Giurgiu
Research Article

DOI: 10.2478/s11534-011-0063-y

Cite this article as:
Popa, A., Toloman, D., Raita, O. et al. centr.eur.j.phys. (2011) 9: 1446. doi:10.2478/s11534-011-0063-y
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Abstract

Structural, morphological and magnetic properties of Zn1−xCoxO (x = 0.01 and 0.03) powdered materials are presented. XRD studies reveal a wurtzite-type structure, while the formation of a Co3O4 secondary phase was evidenced by Raman spectroscopy. A ferromagnetic behaviour with low Curie temperature was evidenced by Electron Paramagnetic Resonance (EPR) investigation. We suggest that the origin of the ferromagnetism in Zn1−xCoxO powders is probably due to the presence of the mixed cation valence of Co ions via a double-exchange mechanism rather than the real doping effect.

Keywords

diluted magnetic semiconductorsZnO powdersferromagnetism

Copyright information

© © Versita Warsaw and Springer-Verlag Wien 2011

Authors and Affiliations

  • Adriana Popa
    • 1
  • Dana Toloman
    • 1
  • Oana Raita
    • 1
  • Alexandru Radu Biris
    • 1
  • Gheorghe Borodi
    • 1
  • Thikra Mustafa
    • 2
  • Fumiya Watanabe
    • 2
  • Alexandru Sorin Biris
    • 2
  • Alexandru Darabont
    • 1
  • Liviu Mihail Giurgiu
    • 1
  1. 1.National Institute for Research and Development of Isotopic and Molecular TechnologiesCluj-NapocaRomania
  2. 2.UALR Nanotechnology Center, Applied Science DepartmentUniversity of Arkansas at Little RockArkansasUSA