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      https://www.ias.ac.in/article/fulltext/boms/026/05/0493-0497

    • Keywords

       

      Polycrystalline ferrites; a.c. susceptibility; Curie temperature; magnetic properties with CaCl2 doping; effect of additives.

    • Abstract

       

      Polycrystalline soft ferrites, Zn$_x$ Cu$_{1–x}$ Fe2O4 (𝑥 = 0.30, 0.50, 0.70, 0.80 and 0.90), doped with controlled amount of calcium chloride (CaCl2) were prepared by standard ceramic route and studied for a.c. susceptibility. X-ray diffraction studies of the compositions reveal formation of single-phase cubic spinel. The values of lattice constant increase as doping percentage of CaCl2 increased from 0.01% to 0.05% and afterwards decrease slightly. The presence of chlorine ions is confirmed by absorption peak in far IR spectra near 650 cm-1 for all the samples. The variation of a.c. susceptibility with temperature shows the existence of single domain structure for 𝑥 = 0.3 and exhibits transition from single domain to multidomain structure with increased Ca2+ contents from 0.01 to 0.1%. The composition, 𝑥 = 0.5, shows multidomain structure independent of Ca2+ content. The samples for 𝑥 = 0.70, 0.80 and 0.90 show paramagnetic behaviour at and above room temperature.

    • Author Affiliations

       

      A Y Lipare1 P N Vasambekar1 A S Vaingankar1

      1. Post Graduate Department of Electronics, Shivaji University, Kolhapur 416 004, India
    • Dates

       
  • Bulletin of Materials Science | News

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