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      https://www.ias.ac.in/article/fulltext/boms/021/05/0409-0413

    • Keywords

       

      Magnetic properties; mixed spinel; Co1+xSixFe2−2xO4

    • Abstract

       

      The structural and magnetic properties of the mixed spinel Co1+xSixFe2−2xO4 system for 0·1≤x≤0·6 have been studied by means of X-ray diffraction, magnetization, and Mössbauer spectroscopy measurements. X-ray intensity calculations indicate that Si4+ ions occupy only tetrahedral (A) sites replacing Fe3+ ions, and the added Co2+ ions substitute for (B) site Fe3+ ions. The Mössbauer spectra at 300 K have been fitted with two sextets in the ferrimagnetic state corresponding to Fe3+ at the A and B sites, forx≤0·3. The Mössbauer intensity data shows that Si possesses a preference for the A site of the spinel. The variation of the saturation magnetic moment per formula unit measured at 300 K with the Si content, is explained on the basis of Neel’s collinear spin ordering model forx≤0·3 which is supported by Mössbauer, and X-ray data. The Curie temperature decreases nearly linearly with increase of the Si content, forx=0·1–0·6.

    • Author Affiliations

       

      S S Shinde1 K M Jadhav1 G K Bichile1 Bimal S Trivedi1 R G Kulkarni1 2

      1. Department of Physics, Dr B A Marathwada University, Aurangabad - 431 004, India
      2. Department of Physics, Saurashtra University, Rajkot - 360 005, India
    • Dates

       
  • Bulletin of Materials Science | News

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