Co doped ZnO semiconductor materials: structural,morphological and magnetic properties |
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| Authors: | Adriana Popa Dana Toloman Oana Raita Alexandru Radu Biris Gheorghe Borodi Thikra Mustafa Fumiya Watanabe Alexandru Sorin Biris Alexandru Darabont Liviu Mihail Giurgiu |
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| Institution: | (1) National Institute for Research and Development of Isotopic and Molecular Technologies, Donath 65-103, 400293 Cluj-Napoca, Romania |
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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. |
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