Magnetic and electric properties of nanoparticles of Ni-substituted ferrites synthesized using a microwave refluxing process
DSpace at IIT Bombay
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Title |
Magnetic and electric properties of nanoparticles of Ni-substituted ferrites synthesized using a microwave refluxing process
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Creator |
PRASAD, NK
NAULAKHA, A JHA, N MEENA, SS BAHADUR, D PRAKASH, O MANDAL, RK |
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Subject |
Microwave refluxing
Ni-substituted iron oxides Magnetic behavior Resistivity SEMICONDUCTING GAS SENSOR NICKEL FERRITE GAMMA-FE2O3 HYPERTHERMIA PARTICLES NIFE2O4 POLYOL MN |
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Description |
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, Mossbauer spectroscopy and magnetic measurements suggest that as-prepared samples were small in size (similar to 15 nm) and hence display low saturation magnetization values (44-60 emu g(-1)). NixFe3O4 transforms into gamma-NiyFe2-yO3 and alpha-NiyFe2-yO3 after sintering at 720 and 1 020 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 gamma-phase at higher temperature.
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Publisher |
CARL HANSER VERLAG
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Date |
2014-10-15T12:50:42Z
2014-10-15T12:50:42Z 2013 |
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Type |
Article
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Identifier |
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, 104(7)680-685
http://dx.doi.org/10.3139/146.110909 http://dspace.library.iitb.ac.in/jspui/handle/100/14931 |
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Language |
en
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