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Access type: UnknownAuthor: search.filters.author.Panyajirawut, Pongladda

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    Preparing transparent cobalt-doped ZnO thin films by DC magnetron sputtering
    (2017-01-01)
    Panyajirawut, Pongladda
    ;
    Pratumsuwan, Nattha
    ;
    Meesombad, Kornkamon
    ;
    Thanawattana, Kridsana
    ;
    Chingsungnoen, Artit
    Thin films of cobalt-doped ZnO were prepared by DC magnetron sputtering on glasses. The cobalt dopant concentration was at 3%wt. The sputtering power was set at 200 watts and sputtered for 20 mins. All films are transparent. The films were then annealed at 100-500 °C under air atmosphere. Crystal structural and optical properties of the films were characterized by XRD and UV-Vis, respectively. The XRD patterns show peaks corresponding to (002) plane indicate thin films obtain hexagonal wurtzite structure. The effects of annealing temperature on crystal structure and optical properties were discussed.
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    Cobalt-doped ZnO powders by a simple solid-state method
    (2016-01-01)
    Panyajirawut, Pongladda
    ;
    Srithep, Kitiya
    ;
    Namsa, Chanatda
    ;
    Kitcharoen, Rawiporn
    ;
    Pecharapa, Wisanu
    Cobalt-doped ZnO powders with various dopant concentrations were synthesized using a simple-solid method. ZnO and Co<inf>3</inf>O<inf>4</inf> powders were employed as the precursors. The powders were annealed at 500-900 °C in air. The crystal structural and magnetic properties were studied by means of XRD and VSM, respectively. The XRD patterns show the hexagonal wurtzite structure of the powders. The magnetic measurements by H-M loops reveal the combination of paramagnetism and ferromagnetism as well as the influence of Co dopant to magnetic properties of Zn<inf>1-x</inf>Co<inf>x</inf>O.