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    Nanocrystalline La1-xSrxCo1-yFe yO3 perovskites fabricated by the micro-emulsion route for high frequency response devices fabrications

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    Type
    Article
    Authors
    Azhar Khan, Muhammad
    Khan, Kamran
    Mahmood, Azhar
    Murtaza, Gulam
    Akhtar, Majid Niaz
    Ali, Irshad M.
    Shahid, Muhammad
    Shakir, Imran
    Farooq Warsi, Muhammad
    KAUST Department
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2014-09
    Permanent link to this record
    http://hdl.handle.net/10754/563730
    
    Metadata
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    Abstract
    Nanocrystalline La1-xSrxCo1-yFe yO3 (x=0.00-0.60) perovskites were fabricated by a cheap economic route (i.e. micro-emulsion method) and characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD), fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). TGA analysis showed ~35% weight loss. The crystallite size determined by XRD and SEM ranged from 30 to 80 nm and ~30 to 50 nm, respectively. The dielectric behavior was evaluated in the range of 1.0×106 Hz to 3.0×10 9 Hz at 298 K, the dielectric parameters resulting appreciably enhanced by co-doping with Sr and Fe. The maximum dielectric parameters (ε′=103.35, ε″=58.92 and tan δ=0.57) were observed for La0.4Sr0.6Co0.4Fe0.6O 3 at 15×106 Hz. Results suggest the potential use of these nanocrystalline perovskites in GHz-operated microwave devices. © 2014 Elsevier Ltd and Techna Group S.r.l.
    Citation
    Azhar Khan, M., Khan, K., Mahmood, A., Murtaza, G., Akhtar, M. N., Ali, I., … Farooq Warsi, M. (2014). Nanocrystalline La1−xSrxCo1−yFeyO3 perovskites fabricated by the micro-emulsion route for high frequency response devices fabrications. Ceramics International, 40(8), 13211–13216. doi:10.1016/j.ceramint.2014.05.027
    Sponsors
    We are thankful to The Islamia University of Bahawalpur-63100 (Pakistan) and Higher Education Commission of Pakistan. One of the authors (Dr. I. Shakir) is thankful to Deanship of Scientific Research at King Saud University (RGP-VPP-312). The international foundation for science (IFS), Sweden is also highly acknowledged for grant no. W/5408-1.
    Publisher
    Elsevier BV
    Journal
    Ceramics International
    DOI
    10.1016/j.ceramint.2014.05.027
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.ceramint.2014.05.027
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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