• Inhibition of domain wall formation and its effects on the bulk magnetic properties of certain spinels

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/013/04/0413-0422

    • Keywords

       

      Multidomain; single-domain; superparamagnetism; domain walls; titanomagnetite; spin glass

    • Abstract

       

      It is shown that hysteresis and susceptibility studies at various temperatures could provide an idea whether a magnetic sample contains multidomain, single-domain or superparamagnetic particles. Our results on titanomagnetites with those of others on cobalt substituted magnesium ferrites suggest that domain wall formation is inhibited in some of them whereby only single-domain or superparamagnetic particles occur irrespective of the physical grain size of such materials. At high concentration of titanium in titanomagnetites, the magnetic behaviour is similar to a spin glass, which we interpret as a transition of optimum single-domains going over to superparamagnetic state.

    • Author Affiliations

       

      C Radhakrishnamurty1 N G Nanadikar1

      1. Tata Institute of Fundamental Research, Bombay - 400 005
    • Dates

       
  • Pramana – Journal of Physics | News

    • 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.