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Effect of deviation from stoichiometric composition on structural and magnetic properties of cobalt ferrite, CoxFe3-xO4 (x=0.2 to 1.0)

Nlebedim, I. C., Snyder, J. E., Moses, Anthony John and Jiles, D. C. 2012. Effect of deviation from stoichiometric composition on structural and magnetic properties of cobalt ferrite, CoxFe3-xO4 (x=0.2 to 1.0). Journal of Applied Physics 111 (7) , 07D704. 10.1063/1.3670982

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Abstract

The effects of deviation from stoichiometric composition on the structural and magnetic properties of cobalt ferrite, CoxFe3−xO4 (x = 0.2 to 1.0), are presented. Both CoFe2O4 and Fe3O4 have a spinel crystal structure, and it might be expected that intermediate compositions would have the same structure. However, results show that synthesis via the ceramic method leads to the development of a secondary α-Fe2O3 phase. Both structural and magnetic properties are altered depending on the concentration of the α-Fe2O3 phase. Saturation magnetization is at a maximum for the stoichiometric composition (i.e., x = 1.0) and thereafter decreases with x. In attempts to achieve the properties required for application, the ceramic method offers the ability to selectively adjust the concentrations of both CoFe2O4 and α-Fe2O3 phases.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Additional Information: Paper presented at 56th Annual Conference on Magnetism and Magnetic Materials, Scottsdale, Arizona, USA, October–November 2011. 3 pp. Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0021-8979/ (accessed 21/02/2014).
Publisher: American Institute of Physics (AIP)
ISSN: 0021-8979
Date of First Compliant Deposit: 30 March 2016
Last Modified: 10 Jan 2018 08:31
URI: http://orca-mwe.cf.ac.uk/id/eprint/25237

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