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Please use this identifier to cite or link to this item: http://purl.org/purl/4349

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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