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      https://www.ias.ac.in/article/fulltext/boms/037/05/0953-0961

    • Keywords

       

      Co-precipitation; magnetic properties; finite-size scaling.

    • Abstract

       

      Cu0.25Co0.25Zn0.5Fe2O4 nanoparticles were prepared by a co-precipitation method and the size was varied by varying annealing temperatures. The cation distribution, estimated using Mössbauer spectroscopy, shows that it is the same for all samples, irrespective of the size. The variation of Curie temperature and saturation magnetization as a function of particle size, studied using d.c. magnetization, clearly indicates that these are a result of finite size scaling effects. The superparamagnetic size limit is estimated to be 8 nm.

    • Author Affiliations

       

      Hina Bhargava1 V D Sudheesh2 J Nehra2 Varkey Sebastian3 N Lakshmi2 K Venugopalan2 V R Reddy4 Ajay Gupta4

      1. Department of Physics, Vijaya College, Bangalore 560 004, India
      2. Department of Physics, Mohanlal Sukhadia University, Udaipur 313 001, India
      3. Department of Physics, Nirmalagiri College, Kuthuparamba 670 701, India
      4. UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore 452 001, India
    • Dates

       
  • Bulletin of Materials Science | News

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