Temperature dependent magnetic ordering and electrical transport behavior of nano zinc ferrite from 20 to 800 K

Prasad, Daruka B and Nagabhushana, H and Thyagarajan, K and Nagabhushana, BM and Jnaneshwara, DM and Sharma, SC and Shivakumara, C and Gopal, NO and Ke, Shyue-Chu and Chakradhar, RPS (2014) Temperature dependent magnetic ordering and electrical transport behavior of nano zinc ferrite from 20 to 800 K. In: JOURNAL OF ALLOYS AND COMPOUNDS, 590 . pp. 184-192.

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Abstract

The nano ZnFe2O4 compound was prepared by eco-friendly hydrothermal method. The characterization of the sample for its structure, morphology and composition were done by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), dynamic light scattering, Fourier transform infrared spectroscopy, zeta surface profiler and UV-Visible spectroscopy studies. The PXRD measurement reveals that the compound shows spinel cubic phase belong Fd (3) over barm (227) space group. Morphology of the compound from SEM and surface profile shows nearly spherical agglomerated particles with well defined grains and grain boundaries. The material shows the semiconducting behavior with E-g of 2.3 eV at room temperature (RT). The variation in the magnetic ordering was observed for wide range of temperature. The compound behaves like a soft magnetic material with ferrimagnetic at various temperatures except at RT. Both magnetic and EPR studies supports the superparamagnetic behavior of the the sample. The DC conductivity, dielectric and AC conductivity behavior of the 1000 degrees C pellets sintered for 2 h shows good frequency dependent transport properties. The present study facilitate in selecting the suitable materials for the nanoelectronics and spintronic applications. (C) 2013 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	JOURNAL OF ALLOYS AND COMPOUNDS
Publisher:	ELSEVIER SCIENCE SA
Additional Information:	Copyright for this article belongs to the ELSEVIER SCIENCE SA, SWITZERLAND
Keywords:	Magnetic nanoparticles; Superparamagnetism; Crystalline anisotropy; Permittivity; AC conductivity
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	06 Mar 2014 06:48
Last Modified:	06 Mar 2014 06:48
URI:	http://eprints.iisc.ac.in/id/eprint/48489

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