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      https://www.ias.ac.in/article/fulltext/pram/045/05/0419-0430

    • Keywords

       

      Magnetic fluid; ESR; temperature dependence

    • Abstract

       

      ESR spectra of a laboratory synthesized kerosene base magnetic fluid containing ultrafine magnetic particles (average diameter of 100A) of Zn0.1 Fe0.9Fe2O4 are recorded at different temperatures. A narrow signal was observed above the melting point of the carrier liquid (200 K) which can be attributed to a very small volume fraction of superparamagnetic particles in the system. The peak-to-peak line width for both low and high field cooled configurations show an increase with decreasing temperature. This observed behaviour has been explained by considering various energy terms which contribute to the line width.

    • Author Affiliations

       

      R V Upadhyay1 D Srinivas1 2 R V Mehta1 P M Trivedi1

      1. Department of Physics, Bhavnagar University, Bhavnagar - 364 002, India
      2. Central Salt and Marine Chemical Research Institute, Bhavnagar - 364 002, India
    • Dates

       
  • Pramana – Journal of Physics | News

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