• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/036/04/0751-0754

    • Keywords

       

      Nanoparticles; magnetic materials; electron paramagnetic resonance spectroscopy.

    • Abstract

       

      In the present work, we have synthesized zinc ferrite nanoparticles by nitrate method. Presence of almost zero value of coercivity and remanence in the hysteresis of these samples shows the superparamagnetic nature at room temperature. Electron paramagnetic resonance spectroscopy performed on these samples in the temperature range 120–300 K indicates the systematic variation of the line-shapes of the spectra with temperature. Both gvalue and peak-to-peak linewidth decrease with increase in temperature. The variation of g-values and peak-topeak linewidth with temperature has been fitted with existing models and we observed different values of activation energies of the spins for both the samples.

    • Author Affiliations

       

      Jitendra Pal Singh1 Gagan Dixit2 R C Srivastava3 Hemant Kumar3 H M Agrawal3 Prem Chand4

      1. Department of Applied Science, Krishna College of Engineering, Ghaziabad 201 007, India
      2. Materials Science Division, Inter University Accelerator Centre, New Delhi 110 067, India
      3. Department of Physics, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar 263 145, India
      4. Indian Institute of Technology, Kanpur 208 016, India
    • Dates

       

© 2017-2019 Indian Academy of Sciences, Bengaluru.