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Magnetic and electric properties of nanoparticles of Ni-substituted ferrites synthesized using a microwave refluxing process

  • Nand Kishore Prasad , Abhinandan Naulakha , Neeraj Jha , Sher Singh Meena , Dhirendra Bahadur , Om Prakash and Rajiv Kumar Mandal
Published/Copyright: November 23, 2012
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 104 Issue 7

Microwave refluxing was found to be a suitable method to produce single phase magnetic nanoparticles of NixFe3−xO4. Ethylene glycol employed in the synthesis plays a crucial role in restricting the particle size to nano dimensions. X-ray diffraction studies, Mössbauer spectroscopy and magnetic measurements suggest that as-prepared samples were small in size (∼15 nm) and hence display low saturation magnetization values (44–60 emu g−1). NixFe3−xO4 transforms into γ-NiyFe2−yO3 and α-NiyFe2−yO3 after sintering at 720 and 1020 K respectively as indicated by X-ray diffraction patterns. This was also confirmed by resistivity measurements. The electrical properties of the two transformed phases were comparable to their bulk values. It has also been found that a large substitution of Ni stabilizes γ-phase at higher temperature.

Keywords:: Microwave refluxing; Ni-substituted iron oxides; Magnetic behavior; Resistivity
e Correspondence address, Dr. Nand Kishore Prasad, Department of Metallurgical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India, Tel.: +91-5422369346, Fax: +91-5422639478, E-mail:

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Received: 2012-4-30
Accepted: 2012-10-24
Published Online: 2012-11-23
Published in Print: 2013-07-11

© 2013, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110909
Keywords for this article
Microwave refluxing; Ni-substituted iron oxides; Magnetic behavior; Resistivity

Articles in the same Issue

  1. Contents
  2. Contents
  3. Award/Preisverleihung
  4. The Werner-Köster-Preis 2012
  5. Original Contributions
  6. Effect of microstructure on the wear resistance of borided Fe–Cr alloys
  7. Microstructure evolution in pure aluminium processed by equal channel angular pressing at elevated temperature
  8. Interfacial reactions between SAC405 and SACNG lead-free solders with Au/Ni(P)/Cu substrate reflowed using the CO2 laser and hot-air methods
  9. Experimental determination of the phase relations of the Co–Pt–Dy system at 773 K
  10. Boron partitioning between SiO2–CaO–MgO slags and liquid silicon at controlled nitrogen potential
  11. Thermally activated redox-processes in V2O5-x under high oxygen partial pressures investigated by means of impedance spectroscopy and Rutherford backscattering
  12. Effect of aluminium addition on densification behaviour and microstructural features of P/M processed Cu–TiC composites
  13. Effect of ZrO2 impurity on promoting reactive sintering of ZrB2–SiC–ZrC composites
  14. Magnetic and electric properties of nanoparticles of Ni-substituted ferrites synthesized using a microwave refluxing process
  15. Optimisation of total roll power using genetic algorithms in a compact strip production plant
  16. Modeling the correlation between yield strength, chemical composition and ultimate tensile strength of X70 pipeline steels by means of gene expression programming
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