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      https://www.ias.ac.in/article/fulltext/boms/025/04/0351-0354

    • Keywords

       

      Polycrystalline ferrites; rare earth; IR absorption; cation distribution; force constants.

    • Abstract

       

      Compositions of polycrystalline Zn𝑥Mg1-𝑥Fe2–𝑦Nd𝑦O4 (𝑥 = 0.00, 0.20, 0.40, 0.60, 0.80 and 1.00; 𝑦 = 0.00, 0.05 and 0.10) ferrites were prepared by standard ceramic method and characterized by X-ray diffraction, scanning electron microscopy and infrared absorption spectroscopy. Far infrared absorption spectra show two significant absorption bands, first at about 600 cm–1 and second at about 425 cm–1 , which were respectively attributed to tetrahedral (A) and octahedral (B) sites of the spinel. The positions of bands are found to be composition dependent. The force constants, $K_T$ and $K_O$, were calculated and plotted against zinc concentration. Compositional dependence of force constants is explained on the basis of cation–oxygen bond distances of respective sites and cation distribution.

    • Author Affiliations

       

      B P Ladgaonkar1 C B Kolekar1 A S Vaingankar2

      1. Department of Electronics, Shankarrao Mohite Mahavidyalaya, Akluj District, Solapur 413 101, India
      2. Department of Electronics, Shivaji University, Kolhapur 416 004, India
    • Dates

       
  • Bulletin of Materials Science | News

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