Effect of the Grain Size on Magnetic Properties of Nanocrystalline CoFe2O4 Ferrite

Abstract:

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Nanocrystalline CoFe2O4 ferrite have been synthesized by a spraying-coprecipitation method. X-ray diffraction (XRD) and Transmission electron microscope (TEM) confirmed the formation of single-phase CoFe2O4 ferrite nanoparticles in the range 10 nm ~ 100 nm depending on the calcining temperature. The magnetic measurements show that specific saturation magnetization of nanocrystalline CoFe2O4 ferrite increases from 36.1 A•m2•kg-1 to 88.6 A•m2•kg-1 as grain size increases from 12 nm to 98 nm. The coercivity shows a peak with grain size, peaking at around 43 nm. The magnetic behaviour of nanocrystalline CoFe2O4 ferrite might be attributed to the effects of surface and random anisotropy.

Info:

Periodical:

Advanced Materials Research (Volumes 308-310)

Edited by:

Jian Gao

Pages:

685-688

DOI:

10.4028/www.scientific.net/AMR.308-310.685

Citation:

Y. Liu et al., "Effect of the Grain Size on Magnetic Properties of Nanocrystalline CoFe2O4 Ferrite", Advanced Materials Research, Vols. 308-310, pp. 685-688, 2011

Online since:

August 2011

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Price:

$35.00

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