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    • NiCr𝑥Fe2-𝑥O4 ferrite nanoparticles and their composites with polypyrrole: synthesis, characterization and magnetic properties

      E H El-Ghazzawy S N Alamri

      Volume 38 Issue 4 August 2015 pp 915-924

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/038/04/0915-0924

    • Keywords

       

      Nanoparticles; ferrites; polypyrrole; composites; characterization; magnetic properties.

    • Abstract

       

      Nanocrystalline nickel chromium ferrite (NiCr𝑥Fe2-𝑥O4, 𝑥 = 0.1, 0.2) have been prepared by the chemical co-precipitation method. Half of the samples have been sintered at 620°C and the other at 1175°C. Then polypyrrole (PPy)–NiCr𝑥Fe2-𝑥O4 composites have been synthesized by polymerization of pyrrole monomer in the presence of NiCr𝑥Fe2-𝑥O4 nanoparticles. The structure, morphology and magnetic properties of the samples have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier transform infrared (FT-IR) spectroscopy and vibrating sample magnetometer. Also, the initial magnetic permeability measurements as functions of temperature and frequency have been performed. The XRD and FT-IR studies have confirmed the well crystalline phase of ferrite nanoparticles, and the presence of amorphous PPy in the composite samples. The SEM and TEM images have obviously clarified the coating of ferrite nanoparticles by PPy in the composite samples. The hysteresis loop of the samples has proved that the samples are soft magnetic material because of their low coercivity.

    • Author Affiliations

       

      E H El-Ghazzawy1 S N Alamri2

      1. Physics Department, Faculty of Science, Tanta University, Tanta 31527, Egypt
      2. Physics Department, Faculty of Science, Taibah University, Madinah 30001, Saudi Arabia

    • Dates

       
      Published
      August 2015
      Manuscript received
      24 November 2014
      Accepted
      20 February 2015

  • Bulletin of Materials Science | News

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