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      https://www.ias.ac.in/article/fulltext/boms/030/04/0357-0363

    • Keywords

       

      Ferroelectromagnetic; dielectric properties; elastic behaviour; internal friction loss; electrical conductivity; polaron hopping.

    • Abstract

       

      Ferroelectromagnetic composites with compositions, 𝑋 Ni0.5Zn0.5Fe1.95O4–𝛿 + (1 – 𝑋) Ba0.8Pb0.2TiO3, in which 𝑋 varies as 0, 0.005, 0.010, 0.015, 0.020, 0.040, 0.060, 0.080 and 1 in mole %, were prepared by conventional ceramic double sintering process. The presence of two phases was confirmed by X-ray diffraction. The temperature variation of dielectric constant, 𝜀', dielectric loss, tan 𝛿, d.c. conductivity, a.c. conductivity, elastic and anelastic behaviour of ferrite–ferroelectric composites were studied in the temperature range 30–350°C. The a.c. conductivity measurements on these composites in the frequency range 100 Hz–1 MHz at room temperature reveal that the conduction mechanism is due to small polaron hopping. The dielectric and elastic data were discussed in the light of phase transitions.

    • Author Affiliations

       

      N Ramamanohar Reddy1 M Venkata Ramana1 K Krishnaveni1 K V Siva Kumar1 V R K Murthy2

      1. Department of Physics, Sri Krishnadevaraya University, Anantapur 505 003, India
      2. Department of Physics, Indian Institute of Technology, Chennai 600 036, India
    • Dates

       
  • Bulletin of Materials Science | News

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