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

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Title Magnetic and electric properties of nanoparticles of Ni-substituted ferrites synthesized using a microwave refluxing process
 
Creator PRASAD, NK
NAULAKHA, A
JHA, N
MEENA, SS
BAHADUR, D
PRAKASH, O
MANDAL, RK
 
Subject Microwave refluxing
Ni-substituted iron oxides
Magnetic behavior
Resistivity
SEMICONDUCTING GAS SENSOR
NICKEL FERRITE
GAMMA-FE2O3
HYPERTHERMIA
PARTICLES
NIFE2O4
POLYOL
MN
 
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.
 
Publisher CARL HANSER VERLAG
 
Date 2014-10-15T12:50:42Z
2014-10-15T12:50:42Z
2013
 
Type Article
 
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
 
Language en