Shahane, G. S. and Kumar, Ashok and Arora, Manju and Pant, R. P. and Lal, Krishan (2009) Synthesis and characterization of Ni–Zn ferrite nanoparticles. Journal of Magnetism and Magnetic Materials, 322 (8). pp. 1015-1019. ISSN 0304-8853

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Nickel zinc ferrite nanoparticles NixZn1−xFe2O4 (x=0.1, 0.3, 0.5) have been synthesized by a chemical co-precipitation method. The samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, electron paramagnetic resonance, dc magnetization and ac susceptibility measurements. The X-ray diffraction patterns confirm the synthesis of single crystalline NixZn1−xFe2O4 nanoparticles. The lattice parameter decreases with increase in Ni content resulting in a reduction in lattice strain. Similarly crystallite size increases with the concentration of Ni. The magnetic measurements show the superparamagnetic nature of the samples for x=0.1 and 0.3 whereas for x=0.5 the material is ferromagnetic. The saturation magnetization is 23.95 emu/g and increases with increase in Ni content. The superparamagnetic nature of the samples is supported by the EPR and ac susceptibility measurement studies. The blocking temperature increases with Ni concentration. The increase in blocking temperature is explained by the redistribution of the cations on tetrahedral (A) and octahedral (B) sites.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Elsevier B.V.
Subjects: Materials Science
Depositing User: Ms Neetu Chandra
Date Deposited: 16 Jul 2012 12:28
Last Modified: 16 Jul 2012 12:28

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