TY - JOUR
T1 - Nanocrystalline La1-xSrxCo1-yFe yO3 perovskites fabricated by the micro-emulsion route for high frequency response devices fabrications
AU - Azhar Khan, Muhammad
AU - Khan, Kamran
AU - Mahmood, Azhar
AU - Murtaza, Gulam
AU - Akhtar, Majid Niaz
AU - Ali, Irshad M.
AU - Shahid, Muhammad
AU - Shakir, Imran
AU - Farooq Warsi, Muhammad
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: 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.
PY - 2014/9
Y1 - 2014/9
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/563730
UR - https://linkinghub.elsevier.com/retrieve/pii/S0272884214007500
UR - http://www.scopus.com/inward/record.url?scp=84903889894&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2014.05.027
DO - 10.1016/j.ceramint.2014.05.027
M3 - Article
SN - 0272-8842
VL - 40
SP - 13211
EP - 13216
JO - Ceramics International
JF - Ceramics International
IS - 8
ER -