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Size-dependent magnetic properties in Cu0.25Co0.25Zn0.5Fe2O4

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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.

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Authors and Affiliations

  1. Department of Physics, Vijaya College, Bangalore, 560 004, India

    Hina Bhargava

  2. Department of Physics, Mohanlal Sukhadia University, Udaipur, 313 001, India

    V. D. Sudheesh, J. Nehra, N. Lakshmi & K. Venugopalan

  3. Department of Physics, Nirmalagiri College, Kuthuparamba, 670 701, India

    Varkey Sebastian

  4. UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore, 452 001, India

    V. R. Reddy & Ajay Gupta

Authors
  1. Hina Bhargava
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  2. V. D. Sudheesh
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  3. J. Nehra
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  4. Varkey Sebastian
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  5. N. Lakshmi
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  6. K. Venugopalan
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  7. V. R. Reddy
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  8. Ajay Gupta
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Correspondence to N. Lakshmi.

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Bhargava, H., Sudheesh, V.D., Nehra, J. et al. Size-dependent magnetic properties in Cu0.25Co0.25Zn0.5Fe2O4 . Bull Mater Sci 37, 953–961 (2014). https://doi.org/10.1007/s12034-014-0031-4

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  • DOI: https://doi.org/10.1007/s12034-014-0031-4

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