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

Muhammad Azhar Khan, Kamran Khan, Azhar Mahmood, Gulam Murtaza, Majid Niaz Akhtar, Irshad M. Ali, Muhammad Shahid, Imran Shakir, Muhammad Farooq Warsi

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

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.
Original languageEnglish (US)
Pages (from-to)13211-13216
Number of pages6
JournalCeramics International
Volume40
Issue number8
DOIs
StatePublished - Sep 2014

ASJC Scopus subject areas

  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Electronic, Optical and Magnetic Materials

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