Yadav, Nisha and Kumar, Ashok and Rana, Pawan S. and Rana, Dinesh S. and Arora, Manju and Pant, R. P. (2015) Finite size effect on Sm3+ doped Mn0.5Zn0.5SmxFe2-xO4 (0 <= x <= 0.5) ferrite nanoparticles. Ceramics International, 41 (7). 8623-8629. ISSN 0272-8842

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Abstract

Samarium doped Mn-Zn ferrite nanoparticles of composition Mna(5)Zn(0.5)Sm(x)Fe(2-x)O(4) (0 <= x <= 0.5) have been synthesized by a chemical co-precipitation method for developing low Curie temperature stable ferrofluid. These samples were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Electron Paramagnetic Resonance (EPR) spectroscopy and search coil method analytical techniques for their structural, morphological and magnetic properties. X-ray diffraction patterns confirmed the formation of crystalline single spinel phase of as grown nanoparticles. Lattice parameter and lattice strain increases with the increase in Sm3+ content. SEM images revealed the presence of ultrafine particles and their agglomerated structures in higher Sm3+ ions concentration analogues. The stoichiometry of the final product agreed well with the initial substitution composition as evidenced by EDS data. Electron paramagnetic resonance (EPR) spectra proved the ferromagnetic nature of nanoparticles. The magnetic measurements by search coil method showed superparamagnetism for x=0, 0.1 the samples with saturation magnetization of 23.95 emu/g for Mn0.5Zn0.5Fe2O4 sample which increases with rise in Sm3+ ions content. The results are explained and correlated with the structural, morphological and magnetic properties for developing stable kerosene based ferrofluid by using these nanoparticles.

Item Type:	Article
Uncontrolled Keywords:	Mn–Zn ferrite nanoparticles; Structural characterization; Magnetic properties
Subjects:	Materials Science > Materials Science
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	23 Sep 2016 05:39
Last Modified:	23 Sep 2016 05:39
URI:	http://npl.csircentral.net/id/eprint/1828

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