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Issue 34, 2005
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The structural and magnetization studies of Co-doped ZnO co-doped with Cu: Synthesized by co-precipitation method

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Abstract

Co- and Cu-doped ZnO of nominal composition Zn0.95Co0.05O and Zn0.94Co0.05Cu0.01O were synthesized by a co-precipitation method in organic media. Rietveld refinement of X-ray diffraction data of the samples annealed at 725 K showed that they are single phase without any secondary phases. DC magnetization measurements of samples with Cu co-doping (Zn0.94Co0.05Cu0.01O) as a function of field at room temperature showed a ferromagnetic signature while the samples without Cu co-doping (Zn0.95Co0.05O) are paramagnetic in nature. Both the samples heated at 1075 K are found to be paramagnetic at room temperature. Resistivity measurements above room temperature clearly showed a semiconducting behavior with a decreased resistivity value for Zn0.94Co0.05Cu0.01O compared to Zn0.95Co0.05O and ZnO, confirming additional carriers in Zn0.94Co0.05Cu0.01O due to Cu co-doping. Our results are in agreement with a recent computational study that doping additional carriers are necessary for realizing room temperature ferromagnetism in Co-doped ZnO.

Graphical abstract: The structural and magnetization studies of Co-doped ZnO co-doped with Cu: Synthesized by co-precipitation method

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Publication details

The article was received on 23 May 2005, accepted on 05 Jul 2005 and first published on 27 Jul 2005


Article type: Paper
DOI: 10.1039/B507201H
J. Mater. Chem., 2005,15, 3514-3518

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    The structural and magnetization studies of Co-doped ZnO co-doped with Cu: Synthesized by co-precipitation method

    O. D. Jayakumar, I. K. Gopalakrishnan and S. K. Kulshreshtha, J. Mater. Chem., 2005, 15, 3514
    DOI: 10.1039/B507201H

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