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Please use this identifier to cite or link to this item:
http://purl.org/purl/4349
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Title: | Structural, magnetic and electrical properties of the sol-gel prepared Li0.5Fe2.5O4 fine particles |
Authors: | Anantharaman, M R Mathew, George Asha, Mary John Swapna, Nair S Joy, P A |
Issue Date: | 17-Feb-2006 |
Publisher: | IOP Publishing LTD |
Abstract: | Fine particles of lithium ferrite were synthesized by the sol-gel method.
By subsequent heat treatment at different temperatures, lithium ferrites of
different grain sizes were prepared. A structural characterization of all the
samples was conducted by the x-ray diffraction technique. A grain size of
around 12 nm was observed for Li0.5Fe2.5O4 obtained through the sol-gel
method. Magnetic properties of lithium ferrite nanoparticles with grain size
ranging from 12 to 32 nm were studied. Magnetization measurements
showed that Li0.5Fe2.5O4 fine particles exhibit a deviation from the predicted
magnetic behaviour. The as-prepared sample of lithium ferrite showed a
maximum saturation magnetization of 75 emu g−1. Variation of coercivity is
attributed to the transition from multi-domain to single domain nature.
Dielectric permittivity and ac conductivity of all the samples were evaluated
as a function of frequency, temperature and grain size. Variation of
permittivity and ac conductivity with frequency reveals that the dispersion is
due to the Maxwell–Wagner type interfacial polarization |
Description: | J. Phys. D: Appl. Phys. 39 (2006) 900–910 |
URI: | http://dyuthi.cusat.ac.in/purl/4349 |
Appears in Collections: | Dr. M R Anantharaman
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