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Correlation between structural, magnetic and spectroscopic properties of Mg substituted CoFe2O4

Nethala, Gnana Praveena and Tadi, Ravindar and Anupama, AV and Shinde, Satish Laxman and Veeraiah, V (2018) Correlation between structural, magnetic and spectroscopic properties of Mg substituted CoFe2O4. In: MATERIALS SCIENCE-POLAND, 36 (2). pp. 310-319.

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Official URL: http://dx.doi.org/10.1515/msp-2018-0043

Abstract

Mg substituted cobalt ferrite spinel powder samples with the general formula MgxCo1-xFe2O4 (x = 0 to 0.25) were synthesized chemically through sol-gel method and annealed at 1100 degrees C for 2 h. They were initially screened for the structural and morphological properties by X-ray diffraction and field emission scanning electron microscopy, respectively. Vibrational properties of the samples were studied by Raman and infrared spectroscopies. X-ray diffraction confirmed the formation of single pure or near-pure phase with cubic spinel structure for all the samples with expected occupancy values. The field emission scanning electron microscopy revealed a decrease in the particle size with an increase in Mg concentration. Both structural and magnetic properties of the samples were characterized using Mossbauer spectroscopy while the magnetic properties were studied using vibrating sample magnetometry. The changes in magnetic moment of ions, their coupling with neighboring ions and cation exchange interactions were confirmed from the Mossbauer spectroscopy analysis. Saturation magnetization and coercivity values can be explained based on the Slater-Pauling curve. The magnetometry results showed a decrease in saturation magnetization of the samples with increase in Mg concentration.

Item Type: Journal Article
Additional Information: Copy right for this article belong to DE GRUYTER POLAND SP ZOO, BOGUMILA ZUGA 32A STR., 01-811 WARSAW, POLAND
Keywords: Mg substituted cobalt ferrite; sol-gel method; Rietveld refinement; vibrational properties; spectroscopic techniques
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Depositing User: Id for Latest eprints
Date Deposited: 14 Sep 2018 14:54
Last Modified: 23 Feb 2019 04:12
URI: http://eprints.iisc.ac.in/id/eprint/60668

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