• Dielectric behaviour of erbium substituted Mn–Zn ferrites

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/024/05/0505-0509

    • Keywords

       

      Dielectric constant; dielectric loss tangent; Mn–Zn–Er ferrites; electrical resistivity.

    • Abstract

       

      Dielectric properties such as dielectric constant (𝜀') and dielectric loss tangent (tan ⋹ 𝛿) of mixed Mn–Zn–Er ferrites having the compositional formula Mn0.58Zn0.37Fe2.05–𝑥Er𝑥O4 (where 𝑥 = 0.2, 0.4, 0.6, 0.8 and 1.0) were measured at room temperature in the frequency range 1–13 MHz using a HP 4192A impedance analyser. Plots of dielectric constant (𝜀') vs frequency show a normal dielectric behaviour of spinel ferrites. The frequency dependence of dielectric loss tangent (tan 𝛿) was found to be abnormal, giving a peak at certain frequency for all mixed Mn–Zn–Er ferrites. A qualitative explanation is given for the composition and frequency dependence of the dielectric constant and dielectric loss tangent. Plots of dielectric constant vs temperature have shown a transition near the Curie temperature for all the samples of Mn–Zn–Er ferrites. However, Mn0.58Zn0.37Er1.0Fe1.05O4 does not show a transition. On the basis of these results an explanation for the dielectric mechanism in Mn–Zn–Er ferrites is suggested.

    • Author Affiliations

       

      D Ravinder1 K Vijaya Kumar1

      1. Department of Physics, Osmania University, Hyderabad 500 007, India
    • Dates

       
  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2021-2022 Indian Academy of Sciences, Bengaluru.