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    • 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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      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

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